Our collars are made with washable cotton fabrics to create a soft, comfortable and lightweight collar for your cat. All collars are made with breakaway buckles and include a split ring with a removable bell. The width is 3/8". Sizing: Kitten 5"-8" Cat 8"-11" Breakaway Buckles are specially designed for cats. If their collar catches on something, the cat's twisting or struggling action causes the buckle to open, freeing the cat. NEVER use a breakaway collar with a leash. Remember...