We are Introducing a New Minky Plush Fur Lining on all of our Coats this Year. The New Lining will give the coats a softer and richer look and feel. We have paired up our Black and White Classic Houndstooth with our New Minky Lining and the result is Pure Class and Quality Important Sizing Note: The following measurements are the dimensions of the actual product, not of the pet they fit. After measuring your pet, make sure all measurements fit within the following dimensions (with a little room to spare in the chest and neck). X-Small Back Length: 8.5" Chest: 10"-12" (Most Important) Neck: 8"-10" Small Back Length: 10.5" Chest: 12"-15" (Most Important) Neck: 11"-13" Medium Back Length: 11.5" Chest: 15"-19" (Most Important) Neck: 14"-16" Large Back Length: 13.5" Chest: 18"-23" (Most Important) Neck: 16"-18" X-Large Back Length: 17.5" Chest Width: 22"-27" Neck: 19"-24" XX-Large Back Length: 20.5" Chest: 26"-33" (Most Important) Neck: 23"-27"