AJ Horse Neoprene Sport Medicine Boots Royal Blue Size: Small (10 " fetlock circumference, 10 " boot height, 13.3-14.1 hands) Size: Medium (12 " fetlock circumference, 11 " boot height, 14.2-16.2 hands) Size: Large (12 " fetlock circumference, 12 " boot height, 16.3-17.2 hands ) Size reference is for front, you may need to go up a size for hind. Color: Royal Blue