Martingale Dog Collar - Teal Green - Small The webbing is made of soft and smooth nylon Limited restriction on a dog's neck, combining the safety of non-slip collars and the comfort of non-choke ones 4 sizes to best fit your dog Size Regular Mode: 27 to 39 cm / 10.6 to 15.4 inches - Size Training Mode: 17 to 27 cm / 6.58 to 10.8 inches 19 beautiful bright colors to choose from