Bra Fitting & Style Guide – Phase 3A Styled Skeleton (Warm Cohesive Fitting Room Layout)

Bra Fitting & Style Guide

Your complete guide to measuring, sizing, and choosing your best-fitting bra.

Find Your Bra Size

Before you can find your perfect bra, you need to know your size. A properly fitted bra will make your clothes look better, feel more comfortable, and give you the support you deserve.

Transcript

You may be asking—why do I need to watch a video on how to measure my bra size? Well, I think you’ll be surprised at what you’re about to learn.

To begin, wear your best-fitting everyday bra. Start by measuring around your ribcage directly under your bust. This number will determine your band size. Next, measure around the fullest part of your bust to determine your cup size. Keep the tape level but not tight. Subtract your band measurement from your bust measurement; each inch of difference equals one cup size.

Finally, check your fit. Your band should sit level around your body, your straps should stay in place, and your cups should fully contain your breast tissue without gaps or overflow. A properly fitted bra should feel snug but comfortable and make your silhouette look smooth under clothing.

Remember—these are guidelines. Your perfect fit may vary slightly depending on brand and style. If you’re between sizes, try both to see which feels better.

Calculate Your Bra Size in 3 Easy Steps

All you need is a soft measuring tape and a non-padded bra. Follow the steps below to determine your band and cup size.

Step 1. Measure for Band Size

A. Measure your underbust using a tape measure, making sure the tape is parallel with the ground. It should not be loose or binding. Exhale to get the smallest measurement possible.

B. Round your measurement to the nearest whole inch. If the number is even, add 4 inches; if odd, add 5 inches. The result is your band size.

Step 2. Measure for Cup Size

A. While wearing a non-padded bra, stand straight with your arms at your sides and measure around the fullest part of your bust. Keep the tape parallel with the ground and not tight.

B. Subtract your band measurement from this number. Each inch of difference equals one cup size (1 inch = A cup, 2 inches = B cup, 3 inches = C cup, etc.).

Step 3. Calculate

Now that you have your band and bust measurements, enter them into the calculator below to see your estimated bra size. Try a few neighboring sizes to confirm the best fit for your unique shape.

HerRoom Bra Size Calculator

Enter your measurements (in inches). We round to the nearest whole inch and match them to our Universal Cup Sizing™ key for a precise starting size.

Underbust (band) measurement Tape snug, exhale, keep level Overbust (full bust) measurement Around fullest part, tape level

Quick help

Not sure where to start? Take a quiz.

Two fast quizzes to pinpoint your size and the styles that’ll love your shape.

Bra Size Quiz

Answer a few fit questions and get a recommended size (with sister sizes).

Bra Style Quiz

We match coverage, neckline, and support to styles that fit your life.

Find Your Bra Style

Already know your bra size but still struggling to find styles that truly fit your body? Take our Bra Style Quiz — it’ll match you with silhouettes that complement your shape and lifestyle.

Universal Cup Sizing™ (UCS)

Fit Diagnosis & Troubleshooting

This section contains information about common breast shapes, separations, and fit concerns. Each subsection preserves your original content and recommendations.

All About Bras

Parts of a Bra

Bra Straps

How to Put On a Bra

Special Fit Topics

Plus Size Bra Fitting

Uneven Breasts

Bra Styles Guide

Each section below retains your descriptive copy for major bra types, such as T-Shirt, Demi, Spacer, Plunge, Balconette, Sports, Strapless, and more.