Bust Sizing

Measure the fullest part of the bust and subtract that number from the band size number listed.
Measurement Difference Cup Size
Up to 1/2 in AA
1/2-1 in A
1-2 in B
2-3 in C
3-4 in D
4-5 in DD

Band Sizing

To calculate an underbust measurement, take a snug measurement around the diaphragm under the bust.
Measurement Difference Band Size
27-28 in 30A-32A XS
29-30 in 32AB-34A S
31-32 in 34AB-36A M
33-34 in 36AB-38A L
35-36 in 38AB-40A XL