[Size]: XXS (3.1cm L3.7cm W/1.5" L1.2" W), XS (4.2cm L3.4cm W/1.7" L1.3" W), S (4.7cm L3.7cm W/1.9" L1.5" W), M (5.2cm L4.2cm W/2" L1.7" W), L (5.7cm L4.5cm W/2.2" L1.8" W), M (5.2cm L4.2cm W/2" L1.7" W) The size is the inner diameter of the shoe, and there may be errors in manual measurement. Please measure the dog’s paw according to our suggestions and pictures, and choose the appropriate size based on the width of the dog’s paw as the main criterion. [Reflective Velcro]: Dog boots have wide slit openings and adjustable reflective straps. Easy to put on and take off. This design can ensure that the elasticity can be adjusted, so that the boots and the dog’s feet fit perfectly. The reflective strips on dog boots can provide good visibility at night and protect the dog’s safety at night. [Waterproof material]: Dog boots are designed with waterproof zippers and Velcro. They can also keep dog paws comfortable, clean, dry, and warm in rainy, snowy and other humid