1. Trace your foot on paper while standing.
2. Measure from toe to heel.
3. Take your foot length measurement and add approx. 10mm. That is your shoe length.
We recommend taking ½ size more than your usual size. For1. 
US 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13
UK 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
EUR 39⅓ 40 40⅔ 41⅓ 42 42⅔ 43⅓ 44 44⅔ 45⅓ 46 46⅔ 47
Heel to Toe (cm) 25.5 25.75 26.25 26.5 27 27.5 28 28.5 29 29.25 29.5 30 30.5

We recommend you add a 1/2 size up from your normal size