Apollo Fins Size Chart
  XS SM MD LG XL
US Men's shoe size 6-7 7-8 8-9 9-11 11 wide-13+
US Women's shoe size 5-6 7-9 9-10 10-11 11 wide-13+
European Men's shoe size 38-39 39-42 42-43 43-45 45-48
Length (inches) 20 21 22 22 22
Width (inches) 8.25 8.75 9.25 9.25 9.25
Weight (pounds per pair) 4.5 5 6 6.5 6.5

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