Optional Size -- There are 4 mini sizes for you to choose, (inner length * inner width) mini S -- 3.5 * 3cm/ 1.38 * 1.18inch; mini M -- 4.5 * 3.6cm/ 1.77 * 1.42 inch; mini L -- 5.3 * 4cm/ 2.09 * 1.57 inch; mini XL -- 5.9*4.8cm/ 2.32 * 1.89 inch. These shoes fit for miniature and small breed dogs.Breathable Comfortable -- Made of high quality neoprene and double-layer mesh fabric upper, multi air holes for breathable, provide air flow and let your dogs' feet breathe freely, making paws healthy and comfortable.Rugged Anti-Slip Soles -- Adopt multi rubber particles for increasing the friction, excellent abrasion-resistant performance for more lasting life. Fit for both indoor and outdoor activities, such as daily walking, strolling, running, hiking and traveling etc.Safe Reflective Strap Design -- With 2 adjustable reflective strap, offer stable and the maximum visibility, keep your dogs safe at night. Quick and easy to put on and take off.Great for Your Dog -- These boots can protect their paws from hurting by hot pavement, hardwood floors and rough ground. Can well protect your dog's paws from jagged stones, sand or any abrasive surface, and keep their paws dry, clean, warm and comfortable.