Step 1:
Use a measuring tape or a piece of string to measure round the ball of your foot in centimetres (cm). This will give you the width of your foot.
Step 2:
Place your foot on a piece of paper (or similar) and draw a line with a pen or pencil at vertical angle touching the back of your heel and a line at the front of your biggest toe.You can now measure this distance with a tape measure or ruler and so giving you the length of your foot.
Step 3:
If you happen to have different size feet (which most of us do!), take the largest measurement and use this a your size.
Step 4:
Now take these measurements and look them up on the size chart found here.