Even within each style there are a range of sizes. The success of your chosen hoofboot is dependent on a snug fit.
How to measure:
After a fresh trim, measure the width of the hoof across the bottom at the widest point. Measure the length of the hoof from the toe to the buttress line of the heel. The buttress line is the farthest weight bearing point of the heel where the hoof wall ends. Do not include the heel bulbs in the measurement. Compare your measurements with the appropriate size chart. Ideally, the length and width measurements should fit into the same size on the chart. Because most of the boots we sell need a snug fit, if you are a size apart we recommend that you order a fit kit. Be sure to check the requirements and measurements against an alternative boot in the EasyCare line–another style may accommodate your horse’s hoof shape better.