Maxbone Easy Fit Harness Ergonomic Design: Ensures a snug and secure fit for optimal comfort. High-Quality Materials: Durable and supportive, reducing strain on your dog's neck and back. Adjustable Straps: Allows for a customized fit to suit different dog sizes. Quick-Release Buckle: Easy to put on and take off for hassle-free use. Comfort & Safety: Provides maximum comfort while keeping your dog safe during walks and adventures. Sizing This style features a relaxed fit; if in between sizes, we recommend sizing down. Small (5-11 lbs): Chihuahua, Pomeranian, Yorkshire Terrier, Pekingese, Havanese, Maltese, Shih Tzu, Papillon, most toy breeds Medium (12-25 lbs): Pug, Cavalier King Charles Spaniel, Boston Terrier, Mini Poodle, Italian Greyhound, Beagle, Dachshund, Pomsky, Miniature Schnauzer, Jack Russell Terrier Large (26-40 lbs): French Bulldog, Shiba Inu, Corgi, Border Collie, Cocker Spaniel