Well other than back in the mid to late '60s a huge multi tool with large spoon and fork, knife blade, scissors etc that came with it's own belt pouch (wouldn't fit in a pocket no way) (still have it) and a gum ball machine tiny Camillus that would fit in one of those clear plastic eggs (still have it) . . .
probably the first serious knife I ever bought was a Swiss Army Executive in red handle. Thin and very pocketable; small and medium blade, orange peeler, scissors and finger nail file. Very civilized knife.
My mentor had one so I tried one out and liked it a lot. Lost it.
Bought one a few years ago in black handle in memory of him.
A few years later in the early '80s I bought a Buck 505 Knight (still have it) and then a Buck 110 (still have it)