Size – Fits Base of Neck to Base of Tail x Fits Necks x Fits Chests X-Small Up to 8″ x 10″-16″ x 17″-22″ Small 8″-12″x 12″-18″ x 22″-26″ Medium 12″-16″ x 14″-21″ x 26″-30″ Large 16″-20″ x 16″-23″ x 30″-34″ X-Large 20″-24″ x 18″-24″ x 34″-38″ XX-Large 24″-
