The Pet Life ® 'Allegiance' Classical Plaided Insulated Fashion Dog Jacket features a Classical Tattersall Plaid Pattern composed of 100% Cotton along the back that extends into the collar with reversible Ultra-Soft Sherpa that gently hugs the body and inner lined with High-Grade Plush Poly-fill for added warmth and comfort. This Plaid Dog Jacket features Tough-Grade Velcro Belly Enclosures for convenient on and off access and a leash slit below the neck line. Available in Multiple Colors and Sizes. SIZING SPECIFICATIONS - In (Inches) "Back" Length is from Neck to Tail - * See image chart for sizing approximation. EXTRA SMALL - Back - 9.1" Chest - 17.3" Neck - 12.2" SMALL - Back - 11" Chest - 21.3" Neck - 13.8" MEDIUM - Back - 13.8" Chest - 24.4" Neck - 15" LARGE - Back - 18.1" Chest - 29.9" Neck - 16.9" EXTRA LARGE - Back - 22.8" Chest - 35.4" Neck - 18.9"