If clothes need to be returned due to quality problems, they can be returned within the agreed time limit and ask for a refund or replacement of other goods.
If you need to return the goods just because of color, size and other reasons, you can negotiate with the seller. If negotiation fails, you may not be able to return the goods unless there is a special agreement.
Although online shopping clothes are cheap, there are relatively few trying-on links in physical stores, and the cost of rights protection is also high when disputes arise. So if you buy luxury clothes, you'd better buy them in reputable shops or physical stores.