How to Measure Bra Size at Home: Step-by-Step Guide

By Women's Lingerie - Underwear | Published: 2026-10-18

Category: How-to Guides

Learn how to measure your bra size at home with a simple step-by-step process. Get accurate measurements for band and cup size to find your perfect fit.

Quick Answer

To measure your bra size at home, you need a soft measuring tape and a mirror. First, measure your band size by wrapping the tape snugly around your ribcage just under your bust. Then measure your bust at the fullest part and subtract the band measurement to find your cup size.

What You Will Need

Before you start, grab a soft measuring tape (the kind used for sewing), a mirror to check tape placement, and a non-padded bra or no bra at all for the most accurate bust measurement. Wear a comfortable, well-fitting bra if you prefer, but avoid padding or push-up styles that can skew the numbers.

Common Fitting Mistakes to Avoid

A common mistake is measuring over clothing or a thick bra, which adds bulk and leads to an incorrect band size. Another is pulling the tape too tight or too loose—it should be snug enough to stay in place without digging in. Also, remember that your bra size can change with weight fluctuations, pregnancy, or age, so re-measure every six months or whenever your bras feel different.

Step-by-Step Bra Measurement Guide

Step 1: Measure Your Band Size: Wrap the measuring tape around your ribcage directly under your bust. Keep the tape parallel to the floor and snug but not tight. Breathe normally and take the measurement in inches. If the number is even, add 4 inches. If odd, add 5 inches. This is your band size. Common mistake: pulling the tape too tight. If the tape leaves a mark, it's too tight.
Step 2: Measure Your Bust Size: Stand straight and wrap the tape around the fullest part of your bust, keeping it parallel to the floor. The tape should be snug but not compressing. Write down this number in inches. Checkpoint: make sure the tape isn't dipping at the back. Use a mirror to verify it's level.
Step 3: Calculate Your Cup Size: Subtract your band size from your bust measurement. Each inch difference equals one cup size: 1 inch = A, 2 inches = B, 3 inches = C, 4 inches = D, 5 inches = DD/E, and so on. Combine your band size and cup letter for your full bra size (e.g., 36C). If your measurement falls between two numbers, try both sister sizes for the best fit.

Bras That Fit Well Make a Difference

Print Wirefree Premium Support Bra - Black Pebble: Our Print Wirefree Premium Support Bra in Black Pebble features a stunning black and white pebble print combined with elegant intricate lace, perfect for everyday wear or special occasions. Wirefree design, full coverage and adjustable straps ensure all-day comfort. Once you know your size, a wirefree bra like this offers full coverage and adjustable straps for a custom fit without underwire pressure, making it a great everyday option.