Note: Please measure your dog's neck circumference carefully before choosing the right size. Product size:The Collar length 66cm/25.9", width 3.5cm/1.3" The collar is adjustable from 61-66cm/24-25.9", 1. Sturdy and Thick Premium Material: Tactical dog collar is designed with super strong nylon and thickened premium material for longer life. 2.Comfortable: We use soft inner lining as inner layer. The outer layer is made of sturdy nylon with two reflective threads. The 2 finger width mounting clearance won't give your dog any pain with this comfortable dog collar. 3.Super Strong Metal D Ring and Safety Buckle: This D ring and buckle adopts the latest super alloy technology, this heavy metal is not easy to collapse. Durability and safety are our primary goals. Two additional sticker patches help create a subtle emotional connection with your puppy. 4. Handle & Adjustable: The tactical handle is designed to better control your dog's movement and keep it safe. In daily training, you can better control his movements and give guidance.