Sprint's Water Walking Assistant can improve your balance and gait by providing support to your upper body while helping to increase strength in your legs. The superior quality PVC makes for uncompromised integrity, and the oversized foam provides both comfort and buoyancy. The handles are padded as well, and the Water Walking Assistant is proudly manufactured in the U.S.A. *Patented* Sizes: Inside measurements: XSmall - 11" x 17" approx. 2 lbs. Small - 11" x 22" approx. 2.5 lbs. Medium - 13" x 24" approx. 4 lbs. Large - 15" x 24" approx. 5 lbs. *Please call for business pricing if you have an aquatic related business. Outside Sizes: XSmall - 16" x 32" approx. 2 lbs. Small - 16" x 38" approx. 2.5 lbs. Medium - 18" x 40" approx. 4 lbs. Large - 20" x 40" approx. 5 lbs.