I imagine panties is going to be the most popular answer by a landslide. They just take up very little space and if you have any female friends who wear a similar size, hand-me-downs will happen (All but three of the first 10 pairs I owned were all given to me by my roommate/ex-girlfriend because she didn’t like how they fit her or because they were just a little too small for her.)
I have 23 pairs of panties now. Five dresses, one skirt, two decent wigs (plus a few cheaper crappier ones that I rarely wear), two pairs of heels (one pair are boots and the other more along the lines of “stripper heels” haha… can’t really wear those out for walks and such!), one pair of flats. A little bit of jewelry, a few necklaces and a small pile of rings.