OmniPet Kwik Klip Adjustable Nylon Pet Harness Medium. 3/4" Width. Fits dogs similar in size to a standard Cocker Spaniel Strap A: Adjusts 17 - 29"; Strap B: Adjusts 12 - 18" Harnesses are adjustable around both the neck (A) and chest (B) Kwik Klip buckles allow harness to be fitted and removed quickly These comfortable harnesses can grow with the dog