42-54cm collar x 3.8cm width made of sturdy nylon fabric. Soft, smooth and not easy to fade. Machine wash or hand wash in cold water only. Wash similar color garments. Reinforced seams are durable. All seam joints are folded over to make it smooth. This makes it more comfortable for you and your furry friend to use. Our collars are designed for training and everyday use. Be sure to adjust the collar to best fit your furry friend’s neck. For maximum comfort, we recommend at least 2 inches (more than 2 fingers) of slack between the collar and the neck.