How to measure your shoe size
Foot length is defined as the maximum horizontal distance from the center of the back of the heel to the top of the most protruding toe, measured while the subject is in an upright position with the weight evenly distributed between the two feet.
To take your foot size, get someone to help you and follow this process:
How to measure your calf
Get a tape measure.
Sit up with your legs at 90 degrees and put your feet completely on the ground.
Wrap the tape measure around the calf and measure it at the fullest part.
To be sure, try taking the measurement many times in many points of the calf until you find the largest one.
The largest measure will be the final one.
Avoid squeezing the tape measure around the calf.
How we measure the leg circumference
We measure the circumference at the height of the calf.
If the height of the boot exceeds the height of the calf, we measure the circumference in the terminal part.
In these cases, the circumference of the calf will be proportional to that of the terminal part.
How we measure the height of the leg
We measure the height starting from the heel up to the upper end.