Premium Material - The upper of the boot is made of waterproof oxford fabric, with soft lining inside, very comfortable for paws, suitable for dog walks, hikes and daily trips, also suitable to bandages or injured paws Soft and non-slip soles - Able to provide traction and well protect dog's paws from pavement, grass, slabs, deck, boat, winter salt, snow, ice, indoor hardwood floors and other surfaces, operation Easy and quick to put on - Control of the closure by a wide elastic and adjustable strap, which also reflects the night 3# reference size - Insole width 1.97 inches. Allocation error: 0.11 - 0.20 inch. These boots are relatively flexible and roomy, so a snug fit is best. If the dog's paws are between 2 sizes and you chose the larger one, you can try using dog socks inside the boots Inner Size (inches) 3#: Width1.97" / 5cm from 6#: Width 2.76" / 7cm Package includes: 4 pack dog boots getveryrich Note: The data is manual measurement, please please allow 1-14cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.