Dear Customers, Please feel free to contact us if you have any problem or question about our products or services, we will do whatever we can to help you! Kuoser reversible Dog Winter Coat Size Information: XS: Back Length: 10.23″/26CM, Neck Girth: 11.02″/28cm, Chest Girth:13.38-15.74″/34-40cm S: Back Length: 12.59″/32CM, Neck Girth: 11.81″/30cm, Chest Girth:16.53-18.89″/42-48cm M: Back Length: 14.17″/36CM, …