Ultimate Direction Women's Running Hydration Vesta's

Size	Ribs (in)	Ribs (cm)
SM	21 - 36	53.34 - 91.44
MD	24 - 40	60.96 - 101.60
LG	28 - 42	71.12 - 106.68
XL	38 - 46	96.52 - 116.84

How to Measure:

RIBS: Measure around the bottom of your ribs.