Size: M - Strap width 3/4", chest girth adjustable from 17.3"-23.4". The straps are adjustable to provide maximum comfort and reliable fit. It is recommended that you adjust the suitable size before putting it on your dog, which will save more time for wearing. Material: High quality nylon fabric with high density webbing to add durability. The large size chest strap has been widened, and its durability will be better. Cute ID Tag. Each chest strap is equipped with an ID tag, and the front is a cute footprint pattern, while on the back, you can engrave whatever you want, such as the dog's name and so on. Safe: Plastic clip closure and two heavy duty D-rings for added security, quick release, easy put on/take off. Make your travel faster and more convenient. Recommend: The nylon collar and leash sold separately in our store are great for matching this harness. Buying separately is more humane, you can choose according to your needs.