DOES YOUR SMALL DOG ESCAPE? ARE YOU WONDERING HOW TO KEEP YOUR DOG IN YOUR YARD? FenceMate is an easy light and comfortable step-in buckle harness that will help to keep you pet safe in their own backyard. The safety harness will not interfere with your pet's daily activities, and is completely water and weather resistant. Fits girth 12"-16" This product has been tested for years with great success. In some exceptional cases teeny tiny puppies may not have a proper fit.