This screen is 4' x 6' made with 1/4" straight rod, and one inch openings. (flat, not woven)I've got a 5'X8' screen I use for both sand / stone separation and screening compost. Expanded metal, so pretty fine.
The difficulty I have with it is finding the best screen angle for the material at hand. Every time I think I should build a structure with a shaker engine, I kick myself awake and recall how infrequently I really need to use such a screen.
But when it's needed, a screen sure is a time and money saver