There are generally two situations when Taobao doesn't have a size chart. One is that the product is originally a one-size-fits-all product. It is suitable for people of all body shapes, so there is no size difference. Just place an order directly! Another is that there is only one size left and the other sizes are sold out, so you can't choose it. You can only buy this size when you place an order. You can choose according to your actual situation