The AKC (American Kennel Club) currently recognizes 189 breeds of dogs, that does not include the number of non recognized breeds or mix breeds. We offer 20 sizes to ensure each dog gets the perfect fit. Other Harnesses are offered in 5 or 6 sizes no matter how adjustable they do not fit the range of sizes from the smallest to the largest. It leaves dogs uncomfortable, they cause rub spots, dogs backing out.
If you are not sure of the correct size refer to our How to Measure/Fit section or contact us at email@example.com. We love to help dogs get the perfect fit :)