How to Find Your True Bra Size at Home: The Definitive 2-Measurement Guide

Studies show that nearly 80% of women are wearing the wrong bra size — typically with a band that is too loose and cups that are too small. This causes the back band to ride up and shoulder straps to dig in.

Step 1: Your Snug Underbust Measurement (Band Size)

Wrap a soft measuring tape directly beneath your bust where the bra band sits. Keep the tape parallel to the floor and exhale fully. If the measurement is 31 inches, round to 32 to determine your band size.

Step 2: Fullest Bust Measurement (Cup Size)

Measure loosely around the fullest part of your bust. Subtract your underbust measurement: a 2-inch difference indicates a B Cup, 3 inches indicates a C Cup, and 4 inches indicates a D Cup.