* Easy to put on - difficult to slip off! * Split seam sides expand - making it easy to put on the boots. * Two Velcro straps with slides fasten the boots in place. * Small 2 1/4\" width; Medium 2 3/4\" width; Large 3 1/4\" width; * Generous foam at the closures create a secure grip and cushion the dog's paw when the boot is tightened. * Tough, water resistant nylon material with the top of the toe and sole wrapped in Toughtek®, a grippy, flexible, skid resistant and durable thermoplastic material, up to 0.8mm thick. * Toughtek® performs in wet and dry, hot and cold conditions. * Available in six sizes in red or black, in sets of four. How to Measure Your Dogs Foot - To measure the width of your dog's foot, place the foot on a piece of paper and press down on the top of the foot, mimicking how the foot spreads when the dog's walking.Mark the left and the right side of the foot on the paper and measure the distance between the marks. Compare this to the boot sizes. The width of the foot should be smaller than the boot size. For example, if the foot width is 2 1/2 inches, order an Small at 2 3/4 inches.