Country Brook Design | Green Paisley Ribbon Step-in Dog Harness Harness fits (14in -24in neck, 14in - 24in girth). There are no standard sizes for dog harnesses. Please be sure to measure your dogs neck and chest (girth) for the correct sizes. Measure around your dogs 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. Made in the U.S.A. Made with top quality hardware Adjustable to fit your dog Polyester grosgrain ribbon sewn on 100% nylon webbing