Description Ohio State Gray Fleece Dog Hood Tiny: 3-5LBS 9-14" Girth XX Small: 4-9LBS 13-16" Girth X Small: 8-14LBS 16-18" Girth Small: 12-20LBS 17-23" Girth Medium: 18-30LBS 19-24" Girth Large: 28-42LBS 20-26" Girth XL: 40-60LBS 22-29" Girth