For most, it's either big, medium or grom-sized. For others, anything that screws in will work. But for the elite few, it comes down to foils, concaves, flex, templates, carbon-fiber-ness, etc. Welcome to the wonderful world of surfboard fins. Instead of pretending we actually know what we're talking about, we're just going to pass you along to one of our resident experts in the field, Conner Coffin, and let him explain which fins really work and what type of waves they work in. Head over to youngwisetails.com for Conner's first in a series of board and fin talks.