Place a sheet of paper on a hard, flat floor against a wall
Wear the socks you plan to use with the shoes
Stand on the paper with your heel touching the wall
Keep your weight evenly balanced on both feet
Mark the tip of your longest toe on the paper
Repeat for the other foot
Measure the distance from the wall to each mark in millimetres or centimetres
Use the longer foot measurement
Compare the measurement to a UK shoe size chart
Measure in the evening for the most accurate size
Leave a little extra room for comfort and toe movement
Recheck the measurement if you are between sizes