You can find your shoe size at home by following some simple steps. All you need is a piece of paper (larger than your foot), a pencil, tape and a ruler or measuring tape.
Step 1: Paste the piece of paper on floor with the help of tape.
Step 2: Sit with your foot firmly on the floor, and your leg bent slightly forward so that your shin is slightly in front of your ankle. Trace the outline of your foot and remember to measure your foot without shoes, but with socks similar to the ones you'll be wearing with the shoes you are buying. Hold the pencil or pen upright and perpendicular to the paper (do not hold it at an angle).
Step 3: Use your pencil to draw straight lines touching the outermost points at the top, bottom, and both sides of the outline.
Step 4: Use your ruler or measuring tape to measure the length from the bottom line to the top line that you drew in step three. Be sure to hold the measuring tape straight, and find the closest mark that you can (for inches, use the closest 16th mark) - don't round up or down dramatically.