With its patented shock absorbing technology, The Ruffª Leash absorbs almost the entire force of your dog's pulling that usually will go straight to your arms and shoulders. The shock absorbing spring is made of Polyurethane which allows it to never lose its shape. Small Ruff Leash: Length 1.2 m. Width 2 cm; Large Ruff Leash: Length 0.8 m. Width 2.5 cm