Upper is made of breathable mesh fabric, firmly hemmed by soft cloth around, with flexible cuffs at the top, capable to keep debris out, and make paws comfortable and dry, suitable for dog's swimming and walking Please measure your dog's paws first, and if the measurement falls between two sizes, just size down to ensure a snug fit because these shoes are relatively flexible and roomy Size Large: Inner Sole length 3.15 in, Inner Sole Width 2.83 in; please bend the cuff outward enough to place the paw into the shoe, and release the cuff once the paw is fully positioned; then fasten with the elastic strap firmly around to keep the shoe in place A set of 4 shoes, and each shoe is fastened by the supple and adjustable strap which can be trimmed to fit for skinny legs Nonslip and soft soles, well protect the dogs' paws on summer hot pavement, grass, tile, deck, boat, winter salt, ice, indoor hardwood floors and other surfaces Size Large: Inner Sole length 3.15 inches, Inner Sole Width 2.83 inches, recommended for dogs weighing 86 to 105 lbs. Please measure your dog's paws first, as this is the most crucial step before choosing the appropriate size. If the measurement falls between two sizes, select the smaller size to ensure a snug fit. While if you've chosen the larger one, you could kindly try to use socks for dog before putting on the shoes and then the shoes will stay on better. The Large-sized shoes also fit some dogs that swim, especially those with relatively wide feet. Please bend the cuff outward enough to place the paw into the shoe, and release the cuff once the paw is fully positioned into the shoe; then fasten with the supple strap firmly around to keep the shoe in place. A set of 4 shoes; you can simply trim the elastic straps short to fasten better if your dog's legs are skinny. LONSUNEER soft dog shoes are paw protectors for dogs, capable to protect paws indoors and outdoors. The dog shoes are comfortable, flexible, lightweight and hand washable.