Great vintage jacket from Patagonia in a lovely teal blue/green color.
size 12 which is about a Large. Would fit a man too.

Size 12
Measured:
Chest size armpit to armpit 24" across
Shoulder to Shoulder or Shoulder to Widest point 21"
Waist size  18" across
Length - Bottom of collar to bottom of jacket 26"
Sleeve length 21"
Sleeve inseam 22"