Determine the primary surf you ride, and characteristics you want.
Mushy surf requires a fin that creates incredible amounts of drive and speed right from takeoff. Hollow surf takes a fin that controls the inherent speed of the wave. Midrange rippable surf can take a blend of both. Choose the fins in your riding style category or move one category left for a looser fin and one category to the right for a stiffer fin.

Outline: John Carper
Height: 4.58 in, 11.60 cm
Base: 4.37 in, 11.10 cm
Area: 15.05 sq in, 97.10 sq cm

This fin equals drive. The full tip with a medium base allows this fin to do its magic.