First, if you are afraid of infringement, you can change the prototype and register the copyright yourself, so you can sue others for selling products intact.

Second, you can't stop others from imitating your products. The only way is to register your own trademark and protect your own brand. Different brands of the same dress have many versions, and the price of each brand is different. So do you want to make a high price or a low price? Therefore, affixing your own registered trademark is the king to safeguard your rights and interests.