This was for a commission. There isn't a specific pattern that should be expected so anything floral print and flared is a good gen.
Notes:
Adding tight_dress to the negatives will help with some checkpoints that really like tight dresses.
Specifying the color or the dress and print should work pretty well.
Example Prompt: [color] floral_mini_dress, [color] floral_print
Side note: I do take informal requests(basically a bounty that you don't have to pony up buzz for) if I like the idea(Tips are nice but not required since if it's a good idea then I'll get generation Buzz). Just leave a comment on one of my models or DM me. (Comments are preferred since that let's other people see that I'm actually fulfilling informal requests.) DMs are perfectly acceptable if your request is a bit out there and needs some image examples or something. As a note I will probably pass on Manhwa characters because I generally find their designs to be kind of bland.(No shade to Manhwa creators, I know many of them are going for regular releases and intricate designs are not what you want in the case.)