Adjustable Reflective Snag-Proof Collar with Hash Marks is a snag proof safety cat collar. This durable collar is 3/8" thick, adjusts 8"-12" and is made from a high quality nylon that is designed not to fray. It has an elastic loop which allows the collar to expand if it gets caught, so your cat can safely slip out. | Hamilton Products Inc. Adjustable Reflective Snag-Proof Pet Collar with Hash Marks in Pink | Size 12"