Alfie Couture Designer Pet Accessory - Keri Harness Vest and Leash Set Please note that this listing is for Small size. Best fit Neck Girth 8.5" - 11" and Breast Girth 14.5" - 17". Leash is 45" in length and 0.35" wide. Sizing for each dog is unique. Similar to our clothing and accessory, medium size from one designer is not the same for another. For example our 9-pound yorkie model usually fits either one of three sizes (i.e. XS, S, M) depending on the designer. We highly recommend you measure your pet precisely with a flexible tape measure to ensure the best fit. Contact us if you have question. We are happy to help. Harness vests are comfortable alternative to collars for small pets as they evenly distribute restraint across the chest. The harness is designed to be gentle and put less stress on the pet when pulling on the lead. All joints are box stitched for extra strength and a quality finish. Perfect for everyday walk and weekend party, or just making your pet look its best.