Butler Creek Size Guide: A Comprehensive Overview (Updated 03/26/2026)

Navigating Butler Creek scope cover sizing can be tricky, but essential for optimal protection. This guide, updated today, 03/26/2026, offers detailed information
and resources to ensure a perfect fit for your valuable optics, referencing charts and community insights.
Understanding Butler Creek Scope Cover Sizing
Butler Creek scope covers aren’t one-size-fits-all; accurate sizing is paramount for a secure and functional fit. These covers are designed to shield your scope lenses from dust, moisture, and impacts, preserving optical clarity and extending the lifespan of your investment. The sizing system revolves around numerical designations, each corresponding to a specific range of scope objective and eyepiece diameters.
Understanding that scopes from different manufacturers – like Schmidt & Bender – can vary even with seemingly identical dimensions is crucial. The provided resources, including the official Butler Creek sizing chart (available at http://www.butlercreek.com/media/ButlerCreek-ScopeCoverGuide.pdf), are invaluable. However, relying solely on pre-populated charts isn’t always sufficient, especially for less common or European-made scopes. Community forums and direct measurements, as discussed by users regarding Big Nikko scopes, often provide more precise guidance.
Ultimately, successful sizing requires a blend of referencing available charts, understanding your specific scope’s dimensions, and potentially seeking advice from experienced users.
Why Accurate Sizing Matters
Incorrectly sized Butler Creek scope covers can lead to a multitude of issues, diminishing their protective benefits and potentially causing damage. A cover that’s too small may be impossible to install, or could apply undue pressure to the scope’s objective or eyepiece, risking scratches or even structural compromise. Conversely, a cover that’s too large won’t provide a secure fit, leaving the lens vulnerable to the elements and accidental impacts.
Beyond physical damage, an improper fit can hinder the functionality of flip-open covers. A loose cover might inadvertently open during use, defeating its purpose. A tight cover could be difficult to operate quickly, impacting target acquisition. As illustrated by user experiences with Schmidt & Bender scopes, even a seemingly correct number (like #28) might not guarantee a perfect fit due to manufacturing tolerances.
Therefore, investing time in accurate sizing isn’t merely about convenience; it’s about safeguarding your optical investment and ensuring reliable performance.
The Official Butler Creek Sizing Chart
Butler Creek provides a comprehensive sizing chart, readily available on their website (http://www.butlercreek.com/media/ButlerCreek-ScopeCoverGuide.pdf), designed to streamline the selection process. This chart correlates scope models with recommended Butler Creek cover sizes for both the objective and eyepiece. It’s a valuable starting point, listing numerous scopes and their corresponding cover numbers – for example, RD00004 requires a 01 size for both ends.
The chart details specific eye and objective sizes, linking them to Butler Creek model numbers like 20010 (01 EYE, 1.341) and 20020 (02 EYE, 1.225). However, it’s crucial to remember this is a guide, not a definitive solution. Variations in manufacturing can occur. The chart is regularly updated, but may not include every scope model currently available.
Users should always cross-reference the chart with direct measurements of their scope (discussed later) for the most accurate fit, especially for less common or older models.
Decoding the Size Numbers: What Do They Mean?

Butler Creek cover size numbers aren’t arbitrary; they represent the diameter of the scope component they’re designed to fit. Lower numbers indicate smaller diameters, while higher numbers signify larger ones. These numbers generally correspond to measurements in inches, though a precise conversion isn’t directly published by Butler Creek.
The ‘A’ suffix, like in ‘03A’, often denotes a slightly larger variation within that size range, providing a bit more tolerance for minor manufacturing differences. Understanding this nuance is crucial when a scope falls between sizes. It’s generally better to err on the side of a slightly larger cover than one that’s too tight.
Remember, these numbers are based on Butler Creek’s standardized measurements. Variations between scope manufacturers can exist, making direct measurement (detailed in a later section) essential for a guaranteed fit. The chart provides a starting point, but precise sizing relies on understanding these numerical designations.
Common Scope Brands and Recommended Sizes
While Butler Creek’s sizing chart is extensive, it doesn’t encompass every scope model. However, patterns emerge for popular brands. For example, Schmidt & Bender (specifically the 6×42 Hungarian model) often requires a No. 14 for the eyepiece and a No. 28 for the objective lens, though fit issues with the No. 28 have been reported.
Other brands, like Nightforce and Vortex, frequently utilize sizes within the 02-07 range for eyepieces and 20-30 range for objectives. However, variations within a brand’s lineup are common. The “Big Nikko” scopes, as discussed in user forums, require specific sizing based on individual models.
It’s vital to consult the official Butler Creek chart as a starting point, then verify with user experiences or, ideally, direct measurement. Relying solely on brand generalizations can lead to incorrect sizing and ill-fitting covers. Always prioritize accuracy over assumption.
Schmidt & Bender Sizing Examples
Schmidt & Bender scopes, renowned for their precision, often present specific Butler Creek cover sizing needs. The 6×42 PMII model, for instance, has confirmed external ocular and objective diameters of 43mm and 57mm respectively. Based on these measurements, a No. 14 flip-open cover is generally recommended for the eyepiece, providing a secure fit.
However, the objective lens frequently requires a No. 28 cover, but user reports indicate potential tightness or difficulty in installation. This suggests slight manufacturing variances or the need for careful application during fitting. It’s crucial to verify the fit before extended use.
Other S&B models, like those in the Classic Diamond series, may require different sizes. Consulting the Butler Creek sizing guide and cross-referencing with community forums dedicated to Schmidt & Bender optics is highly recommended for optimal results.
Measuring Your Scope for Accurate Fit

Achieving a precise fit with Butler Creek covers hinges on accurate scope measurements. Don’t rely solely on scope model numbers; variations exist. Two key dimensions are critical: the objective lens diameter and the eyepiece outer diameter.
Use digital calipers for the most accurate readings. Measure the objective lens across its widest point, ensuring the calipers are perpendicular. For the eyepiece, measure the outer diameter of the housing, not including any protruding rings or adjustments. Record these measurements in millimeters for optimal comparison with the Butler Creek sizing chart.
Remember to measure multiple points on both lenses and take an average to account for any slight irregularities. Precise measurements minimize the risk of purchasing incorrectly sized covers and ensure optimal protection for your scope.
Objective Lens Diameter Measurement
Accurately determining your scope’s objective lens diameter is paramount for selecting the correct Butler Creek cover. Utilize digital calipers, preferred for precision, to measure across the lens’s widest point. Ensure the calipers are held perfectly perpendicular to the lens surface to avoid skewed readings.

Avoid using a ruler or tape measure, as these lack the necessary granularity. If calipers aren’t available, a precise ruler can be used, but exercise extreme caution. Record the measurement in millimeters; this aligns with Butler Creek’s sizing system. It’s wise to take multiple measurements across the objective and calculate the average for enhanced accuracy.

Remember, even slight discrepancies can lead to an ill-fitting cover, compromising protection. A correctly measured objective diameter is the foundation of a successful Butler Creek cover selection.
Eyepiece Outer Diameter Measurement
Precisely measuring the eyepiece outer diameter is crucial for a snug and secure Butler Creek cover fit. Similar to the objective lens, digital calipers are the recommended tool for this task, offering superior accuracy. Measure the widest point of the eyepiece housing, ensuring the calipers are held at a 90-degree angle for a reliable reading.
Avoid estimations with rulers or tape measures due to their inherent imprecision. Record the measurement in millimeters, consistent with Butler Creek’s sizing standards. Taking several measurements around the eyepiece and averaging them can minimize errors. Be mindful of any protruding elements like focus adjustment rings, and measure around them.
An accurate eyepiece diameter measurement guarantees optimal protection and prevents the cover from being too loose or too tight, safeguarding your scope’s delicate components.
Troubleshooting Fit Issues: When Covers Don’t Fit
Encountering fit issues with Butler Creek covers is common, often stemming from inaccurate measurements or scope variations. If the cover is too tight, double-check your eyepiece or objective lens diameter measurements and compare them to the Butler Creek sizing chart; Minor discrepancies can occur due to manufacturing tolerances.
Conversely, a loose fit indicates the cover is too large. Re-measure and consult the chart, selecting the next smaller size. Sometimes, a scope not listed on the chart requires experimentation. User forums (discussed later) are invaluable for finding solutions from others with similar scopes.

Avoid forcing the cover onto the scope, as this can damage both the cover and the optics; Consider that Hungarian Schmidt & Bender scopes, as one user experienced, may require careful size selection. If issues persist, contact Butler Creek’s customer support for assistance.
Popular Butler Creek Cover Models
Butler Creek primarily offers two cover types: Flip-Open and Permanent. Flip-Open covers are the standard choice, lauded for their quick access and convenience, allowing rapid scope use without complete removal. They feature a spring-loaded mechanism for easy operation and are available in a wide range of sizes to fit most scopes.
Permanent covers, as the name suggests, provide maximum protection when not in use. These are ideal for long-term storage or harsh environments, offering a secure barrier against dust, moisture, and impacts. While requiring removal for shooting, they excel in safeguarding your investment.
Both models are constructed from durable materials designed to withstand field conditions. Butler Creek also collaborates with brands like Bone Collector, offering co-branded covers. Choosing between them depends on your shooting style and environmental considerations.
Flip-Open Covers: The Standard Choice
Flip-Open covers represent Butler Creek’s most popular offering, favored by shooters prioritizing speed and convenience. Their spring-loaded design allows for instant access to the scope’s optics – a crucial feature during dynamic shooting scenarios or when quick target acquisition is paramount. These covers remain attached to the scope, eliminating the risk of loss and ensuring they’re always readily available.
A vast selection of sizes caters to a diverse range of scope diameters, as detailed in the Butler Creek sizing chart. The covers are crafted from robust polymers, providing reliable protection against scratches, dust, and light moisture. They’re a practical solution for everyday use and field applications, balancing protection with accessibility.
Many users appreciate the tactile feel and positive engagement of the flip-open mechanism, contributing to a seamless shooting experience;

Permanent Covers: For Maximum Protection
For shooters demanding the highest level of safeguarding for their optics, Butler Creek’s permanent scope covers provide an unyielding defense. Unlike flip-open models, these covers are designed for prolonged, steadfast protection, ideal for long-term storage, transport, or harsh environmental conditions. They securely fasten to the scope, creating a robust barrier against impacts, abrasions, and the elements.
While sacrificing the instant accessibility of flip-open covers, permanent covers excel in preventing damage during rigorous handling or when the scope isn’t in immediate use. Installation typically involves a more secure fitting process, ensuring the cover remains firmly in place.
These covers are constructed from durable materials, offering exceptional resistance to cracking or deformation. They represent a commitment to preserving the integrity and optical clarity of your investment.
Butler Creek Covers for Specific Scope Types
Butler Creek caters to a diverse range of scope types, recognizing that a one-size-fits-all approach isn’t effective. Rifle scopes, being the most common application, benefit from their extensive sizing chart, ensuring compatibility with various objective lens and eyepiece diameters. Spotting scopes, often larger in diameter, require careful measurement and selection from the higher number ranges within the Butler Creek system.
For instance, a Schmidt & Bender 6×42 PMII, as discussed in user forums, necessitates a No. 14 for the eyepiece and a No. 28 for the objective – though fit issues with the No. 28 have been reported, highlighting the importance of precise measurement.

Understanding these nuances is crucial; referencing the official Butler Creek guide and community feedback will guarantee optimal protection for your specific optic.
Rifle Scopes: A Detailed Guide
Rifle scopes represent the largest segment for Butler Creek covers, demanding a precise fit for reliable protection against the elements and accidental damage. The key lies in accurately measuring both the objective lens diameter and the eyepiece outer diameter. Butler Creek’s sizing chart provides a starting point, but variations between manufacturers and even models within a brand necessitate careful consideration.
Many popular scopes, like those from Schmidt & Bender, are listed in the guide, offering suggested cover sizes. However, user experiences, as shared in online forums, reveal potential discrepancies. For example, a 6×42 Schmidt & Bender often requires a No. 28 objective cover, but some users report a snug or difficult fit.
Always double-check measurements and consult community resources for the most accurate sizing recommendations.
Spotting Scopes: Finding the Right Size
Spotting scope covers present unique sizing challenges due to the wider range of objective lens diameters and eyepiece configurations. Unlike rifle scopes with relatively standardized sizes, spotting scopes vary significantly between brands and magnification levels. Butler Creek offers a selection of larger covers to accommodate these dimensions, but precise measurement remains crucial.
Determining the correct size requires careful attention to both the objective lens and the eyepiece. The objective lens diameter is typically larger than those found on rifle scopes, often necessitating sizes beyond the standard range. Eyepiece diameters can also differ, impacting the fit of ocular covers.
Referencing the Butler Creek sizing chart is a good starting point, but cross-referencing with user forums and manufacturer specifications is highly recommended to ensure optimal protection for your spotting scope.
Comparing Butler Creek to Other Brands
When considering scope cover options, Butler Creek stands as a well-established and popular choice, frequently compared to brands like Element and Bone Collector. Butler Creek distinguishes itself through its extensive sizing chart and readily available flip-open covers, offering quick access to your scope’s reticle. However, other brands present viable alternatives.
Element Scope Caps often receive praise for their robust construction and secure fit, sometimes perceived as more durable than Butler Creek’s offerings. Bone Collector, known for its hunting accessories, provides covers with a focus on camouflage patterns and ruggedness.
Ultimately, the “best” brand depends on individual needs and preferences. Butler Creek excels in variety and accessibility, while competitors may prioritize durability or specialized features. Careful consideration of these factors, alongside accurate sizing, is key to selecting the ideal scope covers.
Where to Find Butler Creek Sizing Resources
Locating accurate sizing information for Butler Creek scope covers is crucial for a proper fit. The official Butler Creek website (butlercreek.com) hosts a comprehensive scope cover guide in PDF format, detailing suggested sizes for numerous scope models. This document, frequently referenced by users, provides a valuable starting point.
Beyond the official site, online forums and community discussions, such as those found on dedicated hunting and shooting platforms, offer a wealth of user-generated sizing recommendations. These forums often contain specific advice for less common scope models not listed in the official chart.
Furthermore, retailers specializing in optics frequently provide sizing assistance. Utilizing these combined resources – official charts, community insights, and expert advice – ensures you select the correct Butler Creek covers for your scope.
Online Sizing Tools and Charts
Butler Creek provides a downloadable scope cover guide (ButlerCreek-ScopeCoverGuide.pdf) that serves as a primary sizing reference. This chart correlates scope models with recommended Butler Creek cover sizes for both the eyepiece and objective lens. It’s a valuable resource, though not exhaustive, covering a significant range of optics.
While dedicated online tools aren’t readily available directly from Butler Creek, the PDF chart functions as a digital sizing tool. Users can cross-reference their scope model to determine the appropriate cover numbers. Community-created spreadsheets and sizing guides also circulate on shooting forums, compiling user experiences and expanding coverage beyond the official chart.
Remember to carefully interpret the sizing information, considering potential variations between scope manufacturers and models. Utilizing these charts alongside precise scope measurements is key to a successful fit.
User Forums and Community Recommendations
Online shooting and hunting forums are invaluable resources for Butler Creek sizing information. Discussions frequently address specific scope models, like the Schmidt & Bender PMII 3-12×50, and user-verified cover fits. Experienced shooters often share their sizing experiences, offering practical advice beyond the official charts.
These forums reveal real-world fitment challenges, such as the reported difficulty fitting a No. 28 cover onto a 6×42 Schmidt & Bender objective. Users often recommend checking community threads before purchasing, benefiting from collective knowledge and avoiding potential sizing errors.
Searching for your scope model within these forums can uncover specific recommendations. Remember that individual scope variations may exist, so consider multiple opinions and supplement forum advice with precise measurements for the best results.

Understanding Butler Creek’s Return Policy
While specific details require direct verification with Butler Creek or authorized retailers, understanding their general return approach is crucial when navigating sizing uncertainties. Given the potential for fit issues – as evidenced by user experiences with Schmidt & Bender scopes – a flexible return policy offers peace of mind.
Typically, returns are accepted for unused items in original packaging within a defined timeframe. However, returns due solely to incorrect sizing, stemming from user measurement errors or differing interpretations of the sizing chart, may incur restocking fees or be subject to specific conditions.
It’s advisable to retain proof of purchase and carefully review the retailer’s return policy before ordering. Contacting Butler Creek directly for clarification on their current return procedures related to scope covers is highly recommended, ensuring a smooth process if a return becomes necessary.
Care and Maintenance of Butler Creek Covers
Maintaining your Butler Creek scope covers ensures their longevity and continued protective function. Regular cleaning with a mild soap and water solution is recommended, avoiding harsh chemicals or abrasive cleaners that could damage the material. Inspect the flip-open mechanisms periodically for debris or obstructions, ensuring smooth operation.
For flip-open models, a small amount of silicone lubricant can maintain hinge flexibility, particularly in extreme temperatures. Avoid excessive force when opening or closing the covers, as this can strain the hinges or mounting points. Proper storage when not in use, away from direct sunlight and extreme temperatures, will also extend their lifespan.
Regularly check the covers for any signs of wear or damage, such as cracks or loosening mounts. Promptly replace damaged covers to maintain optimal scope protection, safeguarding your investment in quality optics.
Beyond Scope Covers: Other Butler Creek Products
While renowned for their scope covers, Butler Creek offers a diverse range of products catering to outdoor enthusiasts. Their catalog extends to include durable slings designed for comfort and secure firearm carry, featuring options like the Comfort Stretch Sling for non-slip performance.
Butler Creek also provides caddies and harnesses, enabling convenient and accessible storage of essential gear in the field. These solutions are designed to complement their scope covers, offering a comprehensive approach to protecting and carrying your equipment.
Furthermore, they offer Element Scope Caps, providing an alternative to flip-open covers, and ballistic data carrying solutions. Butler Creek consistently focuses on practical, high-quality accessories, solidifying their position as a trusted brand for hunters, shooters, and outdoor adventurers seeking reliable gear.







































































