Cord thickness 7mmWave size 2-8 feetSmooth rotating nylon cuff and rail saver :: Unisex > Surf Accessories. Purposed designed high-strength urethane cord provides the correct amount of controlled\n stretch and returnHigh tensile brass swivel in rail saver to reduce leash tangling.Extra strong. fray resistant 'Rip and Grip' velcro on cuff and rail saver to ensure\n you never part from your board7mm thicknessHigh comfort neoprene ankle-strap cuffLength: 8ft Size: one size.