The Pet Life 'Dumb one' Dual-Pocketed compartmental animated Dog Harness Backpack features an expressive Elephant-faced animation that's both fun and functional. The Dumb one backpack features dual-zippered usable back pockets that are perfect for placing belongings. Exo-shell features an ultra-smooth suede-like brushed finish that is reversed with comfortable Micro-mesh for complete breathability and comfortability that gently hugs the body. The back of the harness features a harness ring and dual buckles connected to durable seat belt-like heavy duty adjustable nylon straps. Available in Multiple Sizes. SIZING MEASUREMENTS: (In Inches) SMALL: Length: 5.51" Chest Girth: 14.9 - 17.3" (Smaller sized breeds) MEDIUM: Length: 7.08" Chest Girth: 18.1 - 22" (Small to Medium sized breeds).