What’s your go to material and dimensions for signs?

Hey all,

I have this far used 1/4” plywood for signs, simply because it also allows me to choose the shape I want.

I’m looking for ideas for nicer materials to give it a little more strength and depth than thin plywood.

So what materials are yall using for engraved signs? Any specific process you’re using, or dimensions you use?

Generally looking for ideas for nicer-looking signs.