If you purchased ALEXANDRA K. Bliss sneakers, choose your same size. They are slightly larger because they are meant to be worn with thicker socks.
Measure your foot length in centimeter and compare to Insole length.
|EU SIZE||US SIZE||UK SIZE||INSOLE LENGTH IN CM|
Place a piece of paper on the floor and align your heel against the wall, outline your foot on the paper and measure with a ruler in centimeters from your heel to the tip of your longest toe.