Find your FitFlop size quickly and accurately using the instructions and sizing helper below. Measure both feet in millimetres for length and width, using the larger measurements, then match them to the chart below. Our fits are informed by biomechanics, so sizes are designed to support natural movement. Feet can expand during the day, so if you are between sizes it’s usually best to choose the next size up. Fit can vary slightly by style and material, so use this as a guide alongside your usual preferences.