Neck circumference: 15-23cm, with some variation. Suitable for kittens from 3 months old to adult cats. (Please measure your cat's neck before purchasing) Uses a safety buckle. It is designed to come off if pulled. Do not use a leash with this collar. Bells can be added. Please feel free to ask. Discounts available for multiple purchases. This is handmade by an amateur, so there may be imperfections. Please refrain from purchasing if you are sensitive to such details. We are not responsible for any accidents that may occur while using this product.