Base: 7.01''; Depth: 4.49''; Area: 22.78''; Sweep: 39.2; Foil: 70/30; Medium 2 tab fish keel with 80/20 foil has less area and more flex than a traditional keel. This keel will add a little more manoeuvrability and freedom to any retro twin set up. :: Unisex > Surf Accessories Size: one size.