Black Diamond Climbing Harness Size Chart
  X-Small Small Medium Large X-Large
Waist (in) 24-27" 27-30" 30-33" 33-36" 36-39"
Legs (in) 17-19" 19-21" 21-23" 23-25" 25-27"

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