Gooby Stretch Fleece Cold Weather Dog Vest Model Notes: Wearing Medium, Weighs 10 lbs. Neck 10.5" Chest 16" Length 15.5" Estimate Sizing By Weight XS:4-6 lbs. S:5-8 lbs. M:7-13 lbs. L:12-18 lbs. XL:16-23 lbs. 2XL:22-30 lbs. 3XL:30-40 lbs. 4XL:39-50 lbs. 5XL:48-65 lbs. 6XL: 63-80 lbs. Stretchable Fleece 95% Polyester/5% Polyurethane Machine Washable