Size 2: 2.4"x1.7"(L*W) for 18-27 lbs

Size 3: 2.5"x1.9"(L*W) for 23-33 lbs

Size 4: 2.6"x2.1"(L*W) for 31-40 lbs

Size 5: 2.7"x2.2"(L*W) for 40-55 lbs

Size 6: 2.9"x2.5"(L*W) for 52-65 lbs

size 7: 3.1"x2.7"(L*W) for 63-75 lbs

size 8: 3.3"x2.9"(L*W) for 74-88 lbs

*boots may be yellow, red, or black