It's a scam. They make it impossible to get an exchange or a refund. they expect you to return the shoes to China at your own expenses
after waiting for almost a month Ireceived a pair of shoes that I could barely get my foot in because their size 43 is more like a 42 an it hurt my feet. they expct you to pay for return shipping and custom after you already paid $19.99 in shipping to get a $42. pair of shoes. I'll never order stuff from China directly.