SIZE SMALL: Adjustable chest girth: 11-19', leash width: 0.2', leash length: 39'. Please measure your pet and refer to our size information to find the best fit before ordering. BREATHABLE & COMFORTABLE: Made of breathable air-mesh fabric, suitable for all weather wearing. Mesh lining with soft sponge padding in chest and belly to keep pets comfortable. ADJUSTABLE: Adjustable chest belt and stable buckle provide with double secure protection, remember leaving a room to spare in the chest and neck. INTEGRATIVE DESIGN - Design with adjustable buckle, two heavy duty D-rings, breathable mesh and crystal decoration, all these 4 features in one, easy on and easy off. IDEAL PET HARNESS: This amazing harness will make your lovely pet feel ease and look cool. Great for walking, running, and hiking.