The Artful Canine Martingale Dog Collar, Macgreggor Plaid, Medium Dogs 22-35 lbs, (Collar: 3/4 wide, 10" - 15" long) Limited Choke action when adjusted to fit neck keeps dogs from slipping out of collar when on leash Martingale collars are excellent as a safety collar, or as a training collar on leash Fashionable, comfortable, durable, attractive and machine washable collar 3/4" wide colorfast red polyester plaid sewn over heavy-duty red nylon webbing