If you cannot provide the following dimensions, you can also refer to our size table;It depends on the foot type.If you have a wide foot type, it is recommended to choose a size one yard larger, Please select the appropriate size for yourself!</b><br><b>Boots Height: the distance from tops of bootsto the soles of the boots (the heel isn’t included, the highest point of the boots)</b><p><b>Tops of boots Perimeter: the length of circumference a circle of the tops of boots</b><p><b>ShankPerimeter: the length of circumference a circle of the thickest position of the shank</b><p><b>Shank height: the length of from the thickest position of the shank to the soles of boots</b><p><b>The measurement method of feet and shank is as follows:</b><p><b> Step 1: Foot length –distance between big toe to heel;</b><p><b>Step 2: Foot width - the distance between the left and right sides of the foot;</b><p><b>Step 3: Foot perimeter- the perimeter of the widest position of foot;</b><p><b>Step 4: Abdominal perimeter - the distance ofcircumference a circlefrom the feet soles to the highest of the instep;</b><p><b>Step 5: Pocket perimeter - the distance ofcircumference a circlefrom the feet heels to the highest of the instep.</b><p><b>Note:</b><br> 1.There are only has boots height and tops of boots perimeter,if boots height does not exceedshank height.<br> 2.If you can provide the above dimensions, please email us the four sizes of A, B, C, D!