Brand Size US Size US Bra Size Underbust (in) Length (in)
S 4-6 34B/34C/36A 31.9-36.5 20.4
M 8-10 36B/36C/38A 33.4-38.1 20.8
L 10-12 38B/38C 35.0-39.7 21.2

Natural silk has little stretch. For the best fit, consider sizing up.