UrbanPup Active Mesh Neon Pink Harness (Large - Dog Chest Circumference: 18" / 45cm) Breathable material for maximum air circulation Designed to provide the ultimate in comfort Secure clip in easy on easy off action Sizes Range From X-Small to X-Large (Small / Medium Sized Breeds) Large (Chest Circumference: 18" / 45cm). Breed Guide: Shih Tzu, Jack Russell, Pug