Grew up in the San francesco bay area, I'm the late 70's forward...when I first started buying weed it was lids. The term seemed to be loosely used as I've seen mason jar lids, tabbaco lids and a couple others used. Came out to about a half oz usually. But most adjusted price to reflect the size of the lid used. I never liked purchasing by volume...I prefer weight, to many shenanigans. Ahhh who the hell am I kidding... I've always hated purchasing something that can be grown with a little effort.