You will need to select a fin style and size that suits your body type and leg power. Large fins on small legs will cause over exhaustion and can lead to leg cramps or ankle injuries. Small fins on large legs will cause fatigue due to over-kicking with not enough forward propulsion.

Like most items, pick fins that fit and are comfortable. Make sure you select a style that suits your body type and leg power. Decide how often you will be using fins and for what activity. Snorkeling fins will tend to be lighter, with a smaller blade. Full foot fins are used more for snorkeling then for scuba.