Scuba Diving Free Dive Spearfishing Black Rubber Fins w/SS Spring Heel Straps Available sizes: Medium, Large, X-Large / Size M Inside foot pocket Width: 4" Height:2.5" Length:8.5" Size L Inside foot pocket Width: 4" Height:3" Length:9.5" Size XL Inside foot pocket Width: 4 4/18" Height:3" Length:10.5" 19" long, foot pocket is around 4" wide Stainless Steel Spring Heel strap w/ Red easy-grip heel tab. With drain hole on the fins, Neutrally/Positively Buoyant