Small for hoof boot size 0-5, Large for hoof boot size 6-10.
Set of four suitable for a pair of Old Mac's or Trail hoof boots.
Old Mac's inserts are designed to fit long and narrow hooves and provide extra security if needed. Generally only recommended if the width and length are more than 4 sizes apart, but sometime it is necessary to use them especially behind if the horse has a tendancy to twist their hind feet on contact with the ground. Suitable for use in Old Mac and Trail hoof boots.