Find the Right Size: Measure your dog’s width/girth by wrapping a tape measure around your dog’s chest, just behind the front legs. Use the measurement below to find correct sizing. IMPORTANT NOTE: Chest/Girth measurement provides most accurate sizing. XS size: Collar: 7′-11′ Harness: 11′-15′ Leash: 47Ó S size: Collar: 12′-16′ Harness: 12′-20′ Leash: 47Ó M size: Collar: 16′-20′ Harness: 15′-24′ Leash: 47Ó WHY USE A LEASH? Offering safety for dogs when they are crossing roads because dogs don’t know about traffic lights Keeping them from getting lost when they are enjoying the please of taking adventures in unfamiliar places because dogs are quite curious Keeping dogs from possible dangers when taking a walk, also it can stop them timely in a fight