Minimalist line art of a kneeling figure adorned with blooming flowers and a butterfly, set against a soft teal brushstroke—symbolizing body transformation, growth, and gender euphoria at the heart of TOMSCOUT’s sizing support journey.

Chest Binder Size Guide

Discover Your Perfect Fit with Confidence

This guide provides a step-by-step approach to help you measure accurately and choose the perfect fit.

(4-minute read)

A Guide for the Perfect TOMSCOUT Chest Binder

At TOMSCOUT, we’re more than just a brand—we’re your partner in comfort and confidence.

Our passion goes beyond selling chest binders. We’re dedicated to providing you with the tools and support you need to feel comfortable, confident, and help you be your most authentic self.

Understanding Top Bust

Illustrated front-facing chest diagram showing how to measure top bust and underbust, with dashed red lines and labels—TOMSCOUT’s visual guide for trans men, non-binary, and gender-diverse folks seeking an accurate chest binder fit.

FTM-presenting person in a black tank with red dashed lines across the chest and underbust—demonstrating how to take binder measurements while wearing a shirt, making the TOMSCOUT fit process inclusive and accessible.

What is Top Bust?

The top bust measurement, also known as the "upper chest," is a key factor in selecting the right chest binder.

This measurement refers to the circumference of your chest at its highest point, typically just below your arms. By accurately measuring your top bust, you can ensure your chest binder fits comfortably while providing the optimal level of compression for your needs.

Why It Matters:
Knowing your top bust measurement is the first and most important step in finding the perfect fit.

How to measure your Top Bust?

Close-up of a non-binary person measuring their chest with a soft tape measure over a black sports bra—offering a practical, affirming visual on how to get the right TOMSCOUT binder size at home with confidence.

Binder Accurate Measurement Guide

To ensure the perfect fit for your chest binder, follow this simple and accurate guide to measure your top bust:

What You’ll Need: A soft measuring tape or a piece of string (to measure against a ruler afterward).
Step-by-Step Instructions: Wrap the tape snugly but not too tightly around the fullest part of your bust. Ensure the tape goes over your nipples and under your arms, keeping it level and horizontal across your chest.
Pro Tip: For the most accurate measurement, take your top bust measurement while unclothed. This minimizes fabric interference and ensures a precise fit.

Choosing the Right Size

⚠️ Find Your Perfect Fit: Size charts are located next to the sizing options. Simply click on "Size Chart" to access them. ⚠️

【Chest Binder Size Guide】

Our size guide is meticulously designed, leveraging extensive customer feedback and precise body measurements.

This comprehensive resource provides tailored recommendations to help you select the size that aligns perfectly with your unique needs.

【Chest Binder Size Finder】

Exclusive to TOMSCOUT, our Size Finder offers personalized sizing recommendations for each product.

By considering key factors like fabric variations, elasticity, and the effects of textile dyeing, this tool ensures an ideal fit tailored to the specific product you choose.

Why Both Tools Matter:

By consulting both the Size Guide and Size Finder, you can confidently choose a chest binder that fits comfortably and effectively.

Remember, selecting the right size is essential for your comfort, safety, and confidence. A well-fitted binder helps you feel your best every day.

Avoid Common Sizing Mistakes

⚠️ Ordering the Same Size from Another Brand

Sizing standards vary widely between brands. A size that fits you with one brand may not match TOMSCOUT’s sizing. Always refer to our size guide for the most accurate fit.

⚠️ Skipping Measurements

Even if you think you know your size, taking fresh, accurate measurements is essential. This step ensures your binder fits properly and performs as intended.

⚠️ Guessing Your Size

Guesswork often leads to disappointment and an ill-fitting binder. Invest a few moments to measure correctly for a hassle-free experience.

⚠️ Ignoring Compression Levels

Not considering your preferred compression level can result in discomfort or even injuries.

⚠️ Overlooking Size Changes

Changes in your body, like weight fluctuations or muscle gain, may require a new size. Re-measure periodically to ensure your binder remains a perfect fit.

⚠️ Neglecting Material Differences

Materials differ in stretch and compression qualities. Understanding these differences helps you choose the binder that aligns best with your needs.

Measuring Top Bust Without Tools

Detailed women’s bra size conversion chart listing EU, UK, chest, bust, cup, and fluctuation gap measurements—used by TOMSCOUT to help customers translate traditional sizing into binder measurements for a secure, gender-affirming fit.

No Measuring Tape? No Problem!

Don’t have a measuring tape? You can still find your chest binder size using your sports bra or women’s bra size as a reference.

How It Works:
Refer to our Bra Size to Top Bust Converter Chart for an easy and accurate alternative.

This tool helps you determine your top bust measurement without the need for additional tools, ensuring you can still achieve the right fit.

Four transmasc and non-binary models wearing different TOMSCOUT chest binder styles, with a bold overlay text that reads “59 Seconds Quiz – Fast & Easy” to help find the perfect chest binder fit.

Not Sure About the Fit?

Let’s Find Your Perfect Binder!

Answer a few quick questions, and we’ll match you with the best binder for your needs—safely & comfortably.

Find My Fit Now

Questions & Answers

I Used to Order from ABC Brand

Every chest binder brand has its own unique sizing chart and design. Avoid using sizing information from other brands, as it may lead to an inaccurate fit.

To ensure your best fit, always refer to TOMSCOUT's sizing guide and personalized recommendations.

I Can't Find the Sizing Chart

All size charts are located next to the sizing options on each product page.

Simply click on "Size Chart" to access them quickly and easily.

How Do I Know Which Size to Choose?

Our size recommendations are carefully crafted using extensive customer records and feedback.

However, every body is unique, and while we strive to provide the most accurate recommendations, it's important to note that a 100% perfect fit may not be guaranteed for everyone.

Should I Measure in cm or Inches?

For the most precise results, measure your top bust in centimeters (cm). Our product testing and sizing recommendations are based on the metric system for enhanced accuracy.

If Your Bust Measurement is in Inches...

If your measurement is in inches and includes a fraction greater than 1/4", always round up.

Example:

If your measurement is 33 3/4 inches, round up to 34 inches.
Important: Never round down, as this can lead to an ill-fitting binder.

What Defines the Perfect Fit?

Achieving the ideal fit for your binder means:

You can move your arms freely and breathe comfortably without restriction.

Warning Signs of an Incorrect Fit:

If you experience discomfort, difficulty breathing, or persistent back pain, it’s a clear sign you may need a larger size.
Conversely, if your chest hasn’t flattened significantly compared to a sports bra, you might need to size down.

How Do I Find the Right Size and Fit?

Finding your perfect fit is easy:

Consult the Size Charts: Each product page includes precise size charts to guide you.
Explore Our Sizing Guide: For additional insights and tips, review this size guide page before placing your order.

These tools ensure you select the size that suits your body and preferences best.

In Between Two Sizes?

The choice depends on your preferences and body type:

Prefer a snug fit? Choose the smaller size.
If you have broad shoulders or a higher BMI, consider the larger size for added comfort.

Tight or Loose?

Your comfort is key:

Some prefer a snug fit for a more compressed feel.
Others might opt for a slightly looser fit for added flexibility and ease.

What If I Have Ordered the Wrong Size?

We get it—sometimes, even with careful measurements, the size might not be quite right.

No worries! At TOMSCOUT, we’re here to make it right.

What to Do Next:
Simply refer to our detailed exchange policy for a hassle-free size exchange. We’ve designed it to be quick and straightforward, so you can get the perfect fit without the stress.

Your comfort and satisfaction are our priority.