Old Mac’s G2 (generation two) are available in 11 sizes (0-10) with each size increasing by 5mm (3/16 inch) in width and length.

Note 1:  Old Mac’s sizes are in no way comparable to metal shoes sizes.

Note 2: the original Old Mac's were available in 9 sizes (0-8) and its size ranges are NOT the same as the G2.

The unique design feature of Old Mac's allows for width and length adjustment and are therefore suitable for both wide and narrow hooves. Old Mac's sizing caters for natural hoof growth between trimming. If your horse's hooves are excessively long and narrow, Old Mac's inserts are available separately.

Immediately after a proper trim, measure your horse's hooves. If you intend to wear Old Mac's for transportation over metal shoes then you must take your measurements AFTER shoeing. Correct size selection and proper fitting is very important and will ensure maximum performance from Old Mac's Multi Purpose Horse Boots™.

Step 1 Measure the LENGTH of your horse's hoof from the toe of the hoof to the buttress of heel (as indicated in the diagram). On the Old Mac's size chart below circle the length measurement closest to your horse's length.

Step 2 Measure the WIDEST part of your horse's hoof.  On the Old Mac's size chart below circle the width measurement closest to your horse's width.

Step 3 From the two measurements circled on the size chart, select the LARGEST CORRESPONDING OLD MAC'S SIZE. This is the correct Old Mac's boot size for your horse.
Please Note: Diagram is for demonstration purposes only.

size charts for the ORIGINAL Old Mac's

The charts below are provided for your information only – particularly if you have a pair of the original Old Mac's and want to compare their size to the new ones.  The original Old Mac's have been superseded by the G2 model.