Our Non-Adjustable 3/8" Wide Biothane Collar is perfect for non-pulling small dogs, or used as a tag collar only for all dogs. The collar is made with a plastic side release buckle to keep the collar as light as possible. About Biothane Biothane is made in the USA. It is a poly-coated webbing that is 100% vegan and latex free and looks and feels similar to leather. It is durable, waterproof, stink-proof, and easy to clean and maintain. Just wipe off any dirt with a wet towel or hand wash with soap and water. Biothane has a break strength of 1000 lbs per inch of width. Sizing Please note that this collar is NOT adjustable. It is extremely important to follow the sizing instructions below to ensure a good fit. If you have any questions please don't hesitate to reach out before ordering. Measure your dog's neck circumference loosely in inches. Add 1-2 inches for comfort. Handmade with Love This product is made to order by hand. There may be slight imperfections and variations which add to the uniqueness of each item. If you have any questions or would like a custom size please email me at [email protected].