Petzl Men's Harnesses Size Chart
  X-Small Small Medium Large
Waist (in) 23-28" 26-30½" 28-32½" 31½-37"
Leg Circumference (in) 17-19" 18½-20½" 20½-22½" 22½-24½"

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