Neck Circumference:6.8'' -10.24'' Package:Including 1 adjustable collar, 1 matching leash. Collar set adjustable from 6.8'' to 10.24'' for a perfect fit, 51.6'' leash give pet a free walking within your sight. Material: Cotton & Polyester , a stainless steel D-Ring for tag and leash attachment, and a secure plastic side release buckle for easy one handed quick release. Have many Style Before place the order, please measure your pets carefully for making the right purchase.