Durward Ankle Weights REGULAR:Fits most divers (11" to 13" ankles). About 3.3 lb. (1.5 kg.) per pair. LONG: Ankle sizes 13" to 15" About 3.9 lb. (1.75 KG.) per pair. The use of ANKL-WEIGHTS permits a diver to remove some of the weight from the weight belt. However, enough weight should be left on the weight belt so that removal of the belt (even at depth) remains an effective emergency procedure. IMPORTANT - AVOID OVERWEIGHTING ANKL-WEIGHTS are manufactured using form fitting comfortable lead shot in a stretchy rubber and fabric sleeve. Fastening is provided by sturdy, secure, Delrin buckles which can be released with one hand.