Country Brook Design Pink Paisley Step-in Dog Harness - Small Harness fits (14in - 24in neck/ 14in - 24in girth). There are no standard sizes for dog harness. Please be sure to measure your dog's neck and chest (girth) for correct size. Measure around your dog's neck (with string or tape measure) and chest snugly where you want the harness to lay. If you have any questions or problems with sizes please give us a call before ordering. If you have any questions or problems with sizes please give us a call before ordering. 256-974-0700 Breed Recommendation: Boston Terrier, Dachshund, or Pug Made in U.S.A. with top quality hardware Adjustable to fit your dog