Boba Tea Thrift Shop Question

There is definitely a way to curate/create your own thrift outfits. Then there is the seperate mechanic for purchasing ready made ones, which as noted the player cannot see beforehand but merely read a description.

I apologise that I can’t remember the exact interaction with the thrift store rack to do it as it’s been ages since I’ve done that in game. The correct option takes you to a special CAS and each item costs certain simoleons.