Speedo Youth Long Sleeve Rash Guard Size Chart
  X-Small Small Medium Large X-Large
Chest (in) 24.5 26 27 28.5 30
Waist (in) 23.5 23.5 24 25 26
Hip (in) 25.75 27.5 28.5 30 32

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