In this case, you can choose two ways to protect yourself:
1, apply for copyright
Copyright plays a great role in protecting your pattern, so it is impossible for others to use this pattern on clothes or other products in the future. If you apply, you need a personal ID card, job description and information collection form. The price is around 1000.
2, apply for a patent for appearance
You can print it on clothes and apply for a patent for the appearance of this dress, but this protects the whole dress. The application materials include product pictures, ID cards, letters of request, brief design descriptions, etc. The price is around 1000.