The Sports Medicine Boot Elite (SMB® Elite) is available in two designs, accommodating the front and hind legs.  Knowing that each leg functions differently, the SMB® Elite is contoured to provide exceptional fit and function. It is important to choose the correct size for your horse to get the optimum benefits from the SMB® Elite.  In the above chart there are circumference and height measurements.  The circumference measurement of the boot is more critical than the height because the boot must fit around the horser's leg and overlap 1/2" to 1.5" to be effective.  When sizing the height of the horse and the coarseness of the bone should be taken into account, but these should not be the only determining factors. The SMB® Elite is available in small, medium and large sizes (X-Large coming soon).  As a general rule, horses will use the same size on both the front and hind legs.  For instance, many mature horses wear the SMB® Elite in a medum on the front and an SMB® Elite medium on the hind leg as well.  However, in such instances where a horse may have pronounced size differences in the fetlocks, the horse may wear a smaller size in the front than in the rear, or vice-versa. To choose the correct size, refer to the above chart.  If you are still unsure which size to get, you should measure the circumference of your horse's front and rear fetlocks at the widest point (see picture at left).  After doing so, choose the boot size that is the next bigger size than your measurement. As an example, if your horse's fetlock measures 10.75" in the front and 11.5" in the rear, you should choose a pair of SMB® Elites in a large for both the front and rear.