Size Back (A) Chest (B) Chest(C) X-Small 8" 10" 8" Small 10" 14" 10" Medium 15" 17" 13" Large 19" 23" 18" X-Large 23" 27" 21.5" XX-Large 26" 28" 23" XXX-Large 28" 30" 24" Give your dog the comfort and classic style they deserve with the Pendleton Knit Pet Sweater, a timeless cold-weather essential designed for both warmth and fashion. Perfect for small dogs to extra large size dogs! Sizes are available for XS to XXX Large! Key Features:• Soft, warm 100% acrylic knit• Pullover style for easy dressing• Convenient leash/harness opening on back• Machine washable for easy care• Fits most cats and dogs, from XS to 3XL Fit Tip: Sweaters may run small. When in doubt, size up.Be sure to measure your pet and check our size chart to find the best fit.