Shell and boomba aka bumba are still used at the original Buddy's on Conant. Like 65memories I learned those terms used for draft beer sizes during the late sixties when I would come to Detroit to work summers on the assembly lines and live by Wsu. The term was common at the Alcove, Vern's and everywhere in Hamtramck.

I alway assumed it was a Detroit thing and have never heard it elsewhere. I never discerned a specific size for them just small and big, like 12 oz and 16 oz.