Before you begin taking hoof measurements, please ensure your horse has a fresh and accurate trim.
Simply follow the steps below to select the correct size. Feel free to contact our friendly staff for assistance. Sizing is imperative to a good fit. We cannot exchange used boots.
Old Mac’s G2 are available in 11 sizes (0-10) with each size increasing by 5mm (3/16 inch) in width and length. It is important to note Old Mac’s G2 sizes are in no way comparable to metal shoes sizes.
The unique design feature of Old Mac’s G2 allows for width and length adjustment and is therefore generally suitable for both wide and narrow hooves. Old Mac’s G2 sizing allows 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 use Old Mac’s G2's over metal shoes for transportation 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 G2 Multi-purpose Horse Boots™.
How to get the correct size boot for your horse:
Trim Hoof - Before measuring, ensure your horse’s hooves have been correctly trimmed with all flare and excessive length removed. We also recommend that the edge of the hoof wall, where it meets the ground, be beveled (rolled) with a rasp. This removes the sharp edge of the hoof wall and prevents chipping and white line separation.
Select Size - Accurately measure the length and width of your horse’s hoof at the widest point. From the charts below, select the size that matches the measurement.
Old Mac's G2 Sizing
Size
Width in inches
Length in inches
Size
Width in mm
Length in mm
0
3 15/16" - 4 1/8"
4 1/8" - 4 5/16"
0
100-105mm
105-110mm
1
4 1/8" - 4 5/16"
4 5/16" - 4 1/2"
1
105-110mm
110-115mm
2
4 5/16" - 4 1/2"
4 1/2" - 4 3/4"
2
110-115mm
115-120mm
3
4 1/2" - 4 3/4"
4 3/4" - 4 15/16"
3
115-120mm
120-125mm
4
4 3/4" - 4 15/16"
4 15/16" - 5 1/8"
4
120-125mm
125-130mm
5
4 15/16" - 5 1/8"
5 1/8" - 5 5/16"
5
125-130mm
130-135mm
6
5 1/8" - 5 5/16"
5 5/16" - 5 1/2"
6
130-135mm
135-140mm
7
5 5/16" - 5 1/2"
5 1/2" - 5 11/16"
7
135-140mm
140-145mm
8
5 1/2" - 5 11/16"
5 11/16" - 5 15/16"
8
140-145mm
145-150mm
9
5 11/16" - 5 15/16"
5 15/16" - 6 1/8"
9
145-150mm
150-155mm
10
5 15/16" - 6 1/8"
6 1/8" - 6 5/16"
10
150-155mm
155-160mm
Click here for a hoof measuring log with G2 size chart.
Important Size Notes
If your horse is between sizes, go to the larger size.
If the WIDTH measurement exceeds the LENGTH by more than one size (an extremely short and wide foot) we do not recommend Old Mac's G2’s. Old Mac’s Originals are more suitable for this hoof shape.
If the LENGTH exceeds the WIDTH by more than one size (a very long and narrow foot), we do not recommend Old Mac's G2's. If the hoof is long and narrow, but fits within the size chart, inserts may be used.
Old Mac’s Inserts should ONLY be used:
• If the boot is slightly too wide, and you need a tighter fit
• For a club foot
• If one hoof is distinctly smaller than the other
Feel free to call our friendly staff for assistance. 1-800-447-8836.
Sizing is imperative to a good fit and a great Old Mac’s experience.