First, grab a soft measuring tape—the kind you’d use for sewing, not the one from your tool shed. You’ll also need a mirror and about three minutes when no one is asking you for a snack. Yes, you can do this in your yoga pants.
Step one: Find your band size
Wrap the tape snugly around your ribcage, right under your bust where the band sits. Keep it level all the way around, like painting a straight line on a wall. If the number is an even number, that’s your band size. If it’s odd, add five to it—for example, 29 inches becomes a 34 band.
My friend Sarah once measured herself while holding a cat, and let me tell you, that number was all over the place. Be still. Stand up straight, exhale normally, and don’t let your pet help.
Step two: Measure your bust
Now, measure around the fullest part of your chest, keeping the tape loose so you don’t squish anything. Write that number down—let’s say it’s 37 inches. The difference between your bust measurement and your band size is your cup letter. Every inch equals one cup size: one inch is an A, two inches is a B, three inches is a C, and so on.
Cup Size Comparison Calculator
So if your band is 34 and your bust is 37, that’s a three-inch difference—welcome to a 34C. It’s like the bra version of "Goldilocks": not too tight, not too loose, but just right.
