I'm afraid that you regard the size as Euro Size and US Size.please do not follow system size chart !!!
if you want make a very correct choice you should choose by the size chart image !!!
Thank you I wish you a happy shopping

Note:
1 Please Contact us in time if you have any problem About the product,We can help you solve most of the troubles,then give you Good service.
2 If you are not satisfied with the product that exists damaged or you did not receive the product and so on, you can immediately apply for a refund, we will return your money.
so we suggest if you what make a correct choice you should choose by size chart
the size chart is at the last image , please take care