Dog Boots Waterproof Pet Boots for Medium to Large Dogs Labrador Performance Shoes For Dogs Molded rubber bottom: non-slip and waterproof Elastic straps with reflective tape for safely walking at night The size is the size inside the boots, not boots size outside; Choose size according to width is better Cute pet paw Embroidery Size reference: size 4(2.5"x1.9") for 30-42 Lbs; size 5(2.7"x2.2") for 40-55 Lbs; size 6(2.9"x2.5") for 52-65 Lbs; size 7(3.1"x2.7") for 63-75 Lbs; size 8 (3.3"x2.9")for 74-88 Lbs