SeaSoft Hoods XS-2XL Size Chart
  X-Small Small Medium Large X-Large 2X-Large
Circumference of head at widest point (inches) 20-21 21-22 22-23 23-24 24-25 25-26
Circumference of head at widest point (cm) 50-53 53-56 56-58 58-61 61-63.5 63.5-66
Circumference of neck (inches) 13 14 14 15 16 17
Circumference of neck (cm) 33 35.5 35.5 38 40.5 43

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