How to measure the hoof
Using a flat ruler from your desk or a tape measure, pick up the largest hoof. Looking at the flat, bottom of the hoof, measure from the front tip of the toe to the end of the heel bulbs. It is a straight line from the front to the rear of the hoof. Include the bulbs because they must also go through the socks. Then turn your ruler width-wise and measure the widest width of the hoof. Those are the two measurements you need to determine the size of the socks to order.
Using a flat ruler from your desk or a tape measure, pick up the largest hoof. Looking at the flat, bottom of the hoof, measure from the front tip of the toe to the end of the heel bulbs. It is a straight line from the front to the rear of the hoof. Include the bulbs because they must also go through the socks. Then turn your ruler width-wise and measure the widest width of the hoof. Those are the two measurements you need to determine the size of the socks to order.