SIZE CHOICE 1 insole length: 1.3 insole width: 1.0 recommanded weight: 1-3lb. 2 insole length: 1.5 insole width: 1.2 recommanded weight: 3-6lb. 3 insole length: 1.7 insole width: 1.4 recommanded weight: 6-10lb. 4 insole length: 1.8 insole width: 1.5 recommanded weight: 10-15lb. 5 insole length: 2.0 insole width: 1.6 recommanded weight: 15-20lb.(weight is only for reference you'd better measure your baby according to the size chart for perfect fit; usually the fornt paws are bigger than the hind paws so mainly refer to the front paws if the difference is big ordering one more set size down for hind paws can be considered) FABRIC the edge of the mesh vamp covered with PU more fashionable and better paws protection; long high-qulity PU Hook and Loop; sofe durable anti-slip rubber sole. DESIGN pink dog booties for princess baby cute and elegant candy color with stylish PU; breathable mesh vamp not stuffy feet in hot weather; closured by Hook and Loop V-shaped opening easy to wear and freely adjust the tightness; non-slip design rubber sole high temperature resistance. FUNCTION effectively provide stability traction and protection from sharp thorns hot pavement smooth floors stones grasses wet ground snows etc... OCCASION home wear on smooth floor or to prevent scratching the floor and the furniture; some outdoor activities like walking hiking hunting travelling or taking photoes etc...