The size medium step in nylon dog harness has a 3/4 inch wide strap that adjusts form 18 inches to 28 inches. This Kwik Step Nylon Dog Harness has brass hardware. One Kwip Klip buckles at the shoulders and quickly fastens this sturdy nylon harness! The flexible design features size chest and abdominal adjustments, so getting the ideal fit is easy! To get the proper size, measure dog around just behind its front legs. Available in 4 colors Red, Blue, Black and Purple.