Want a simple way to work out your bra size? You’ll need a tape measure in inches.
Measure Your Band Size
Wrap the tape measure snugly (but not too tightly) around your ribcage, just below your breasts. This measurement in inches is your band size.
Calculate Your Cup Size
Wrap the tape measure around the fullest part of your bust, without pulling it tight.
Subtract your band size (step 1) from this measurement. The difference in inches will determine your cup size.
Combine the Two
Join them together to get your bra size. For example:
Band size = 38”
Cup size (41” - 38” = 3” difference) = C
Bra size = 38C
If you’re between band sizes, size up to stay comfy and supported.