Thrust and efficiency characterize this split fin, which uses advanced design technology via its Whale Tail foot pocket to create maximum energy transfer for optimum performance. Features ABS Plus buckles for added comfort. Two year limited warranty.SizeSmallRegularExtra LargeBlade*14 13/16" (37.5cm.)15" (38cm.)15 13/16" (38.5cm.)*Blade length is measured from the end of footpocket to end of blade