Gufi Dog Training Leash and Collar No Pull Slip Lead 1/2 Inch by 6 Feet Long for Dogs 8-figure design will tighten up when dog pulls and loosen up afterward Easy to use: slip on and slip off Made of sturdy materials: smooth and strong The 0.5'' is good thickness for a large dog, it feels great on hands. Length:6'' Excellent for training, walks, and running