Coz our shoes are sold worldwide, so all our shoes molds are made in standard EU size. You can find our own size information which besides to the size option, our size conversion is in consistency with international one, such as US 7=EU 38, US 8=EU 39. So just according to your EU size which you usually wear to order right US size. If you are unsure of which EU size you should choose, you can also confirm it in our size chart or contact us. Thank you!