Planet Dog Cozy Hemp Adjustable Harness SMALL: Neck = 8-14", Chest = 16-26", T-strap on back = 4" MEDIUM: Neck = 14-25", Chest = 22-34", T-Strap on back = 5.75" LARGE: Neck = 18-37", Chest = 24-40", T-strap on back = 6.25" Naturally Rugged, fully adjustable, fleece lined harness Made with a nylon-reinforced plastic and metal hardware for extra durability and safety Machine wash, Hang dry. 100% Guaranteed; Any time, Every time! 10 times stronger than cotton Completely hypoallergenic Once grown is 100% biodegradable Resists mold, mildew, odors and UV rays Machine washable