It's okay, because amai allows you to exchange one time free of charge. You also get the seven-day "trial period" mandated by consumer protection laws in which you can just return them.
沒關係，amai 還提供 1 次免費宅配的換貨服務，也能在《消保法》規定的「7 天鑑賞期」內直接退貨。