IOFFICE Soft Dog Harness with Leash Set, Innovative No Pull & No Choke Design, Soft Double Padded Vest for Premium Control Authentic Puppia Soft Dog Harness made out of 100% Polyester Adjustable chest belt and quick-release buckle Comfortable padded neck opening Machine washable, but hand washing and air drying are recommended IMPORTANT Please Measure Around Head to Make Sure Head Can Pass Through the Neck Opening. Very Important to Measure Before Buying, Do Not Buy Based on Previous Owned Brands, Measure to Get an Exquisite Fit! X-Small (FOR VERY SMALL DOGS): Max Base of Neck- 7.5 inches Chest Girth: 9-13 inches Small: Max Base of Neck- 9.8 inches Chest Girth: 12-18 inches Medium: Max Base of Neck- 12.5 inches Chest Girth: 14-21 inches Large: Max Base of Neck- 14 inches Chest Girth:19-29 inches Please make sure the harness' neck opening is large enough to fit your dog's head through. Unlike human clothes, pet apparel designers have different sizing characteristics. Please do not purchase a Puppia harness based on the size of another manufactuerer/designers