Mammut Women's Harness Size Chart
  X-Small Small Medium Large X-Large
Waist (in) 24½-27½" 27-29½" 28½-31½" 31-34½" 34-38"
Circumference of thigh at widest point (in) 18½-21" 20½-23" 22-24" 23½-26" 25-28"

These are general guidelines only, sizes are not guaranteed. But no worries, since at SunnySports we offer our exclusive PFF Guaranty