Both of these are labeled “C,” but a 34C holds noticeably more volume than a 32C. That’s because the C cup on a 34 band reflects a 3-inch bust-to-band difference on a bigger starting number the actual bust measurement is larger.
Real numbers
- 32C: roughly a 35-inch bust
- 34C: roughly a 37-inch bust
That’s about a 2-inch difference in actual bust size, despite the identical cup letter.
What this means when shopping
If a friend recommends “just get a C cup,” ask what band she wears a 32C and a 40C are very different bras. Always pair the cup letter with the band number.
Check your real numbers with our Cup Size Calculator, and see exactly how two sizes compare using our Bra Size Comparison Tool.