Anatomical Chart (front leg)
A. Oblique extensor of knee

B. Extensor of knee

C. Annular ligament

D. Common digital extensor (extends toe)

E. Lateral digital extensor (extends pastern)

F. Small metacarpal (splint) bone

G. Branch of suspensory ligament

H. Superficial flexor tendon (flexes pastern)

I. Check ligament

J. Deep flexor tendon (flexes toe)

K. Suspensory ligament

L. Large metacarpal (cannon) bone

M. Coronet Band

1. Fetlock area

2. Sesamoid area

General Sizing

                                             Small......14 to 15 hands tall           Medium.......15 to 16.2 hands tall

                                             Large........16.2 to 17.2 hands          X-Large.......17.2 hands & up

 
Precise Sizing Chart

FRONT LEG
(Medium Sizes)

1. - 9" circumference

2. - 8" circumference

3. - 10" circumference

4. - 9 1/2" tall

5. - 10 1/2" tall

6. - 8" circumference

7. - 14 3/4" circumference

8. - 15" tall

HIND LEG
(Medium Sizes)

1. - 10 3/4" circumference

2. - 10" circumference

3. - 9" circumference

4. - 10 1/2" circumference

5. - 9" tall

6. - 11" tall

7. - 12" tall

8. - 13" tall

9. - 8" circumference

10. - 15" circumference

11. - 24" tall
If a horse's measurements are smaller than shown in the above chart, a size SMALL boot is appropriate. If the measurements are 1" larger than shown above, a size LARGE boot is appropriate. For measurements more than 1" larger than shown above, a size X-LARGE is recommended.