Measurement A-B (Cannon Bone Circumference) - around your horses cannon bone.
Measurement C-D (Length) - Measure from the bottom of the horses fetlock joint to approx 3cm below the horses knee,
allowing enough clearance so that when the horses leg is flexed upwards the boot would not intefere with free movement of the knee.
A - B
Cannon Bone Circumference
C - D
NB: Quoted sizes may vary slightly. NB: Straps are elasticated, so do afford some small flexibility in sizing.