Use the below measurements as a guide to determine which size to order. We recommend measuring a similar garment to compare. Please note measurements are in inches and taken when flat. 
XS -
A: 5.75, B: 6, C: 8
S -
A: 6, B: 6.5, C: 8.75
M -
A: 6.5, B: 7.5, C: 9
L -
A: 7 , B: 8, C: 9.5
XL -
A: 7.5, B: 8.5, C: 10