Why don’t you find something that fits well, from a large, established company, and just buy the same thing again when it wears out?
Literally everything I own comes from American Eagle (jeans only), Uniqlo, or Muji. When I need something new, I just buy it online because I know neither their sizes nor my ass has changed significantly enough that I would be required to try something on.
If you are being a minimalist about things, you could break down your entire wardrobe to 2-3 pants, 10 shirts, 2-3 shorts, socks and underwear. If you can replace them all at the same time, all of the shopping you would do in 12-18 months can be finished in 10 minutes.
I’ve been doing this personally for something like 15 years.