Knickers are a personal choice but i always aim for something that is big enough yet small enough to comfortably hide my rather large bits n bobs (hahahaha).
Sports knickers & bras are in my mind perfect for keeping everything in position. Forget half cup and the under-wired bras, they hurt like hell, look & feel awful with falsies. No wonder most genetic women are now buying the new more comfortable cover all solution currently advertised.
Of course if i’m wearing latex then it has to be a pair of latex panties which i make myself.