The Sophisticated Pup Solid Color Dog Bow Tie Collection is made of a premium poly/cotton blend. They are lined with a stiff interfacing to help keep their shape. The bow ties are machine washable and adjustable and attach to the collar with 2 hook and loop fastener straps on the back. These adorable bow ties can be added to any dog collar, making them the perfect accessory for your dog! **Collar not included. Bow Tie Sizing: XSmall: 3 inches (tiny breeds) Small: 4 inches (10 to 20 lbs.) Medium: 5 inches (20-40 lbs.) Large: 6 inches (40 lbs.+) Sophisticated Pup products are handmade in Chicago, IL.