Practicable Reference Size of Large: Inner Sole Length 3.15 inch, Inner Sole Width 2.83 inch. Lonsuneer soft dog booties are reliable paw protectors for dogs, capable to protect paws indoor and outdoor, and also capable to protect bandages. The boots are comfortable, flexible, lightweight and hand washable. Please measure across the whole paw pad to get paw width and length, incl. all the toes, nails and hair. Please kindly bend the soft cuff down outwards to put on the boots, and then, recover the cuff after getting the boots on. Then, fasten the boots by the adjustable strap, capable to prevent slipping off and supply a tightness. Finally, adjust the boots on paws slightly. Kindly Attention: Though the soles are waterproof, the boots can't be applied in deep water or in heavy rains, because there may be water seepage through sewing needle holes or through mesh fabric.