Super tough 1680 synthetic Denier Bell Boot with front Velcro closure offering maximum protection of heel and coronet band. The soft roll helps prevent boot from spinning. Durable Ballistic nylon outer cover and binding makes these boots especially tough and able to take the daily abuse of riding in any discipline. Ultra Shock lining absorbs energy from overreaching and protects the vital areas of the hoof, cornet band and bulbs of the heel, while the soft no -turn knob keeps the boot from spinning. SIZING CHART: BALLISTIC OVERREACH BOOTS BELL BOOT SIZES: C F X -L Ballistic Overreach Boots BB252 BB253 BB254 Horse Height (in hands) : 14 – 15 15 – 16 16 – 17 Pastern Circumference: 8.5″ 9″ 10″ Boot Height: 4.25″ 4.5″ 4.75″ Bottom Boot Circumference: 13.5″ 15″ 15.5″ Note: Ballistic Overreach Boots should have no overlap when applying them to the hoof because of the NO -TURN knob. Sizes are based on averages. Because each horse is different, always measure your horse to be certain you are purchasing the correct size.