We have a clear glass ashtray.  It is about 3 3/8" square x about 3/4" in H.  Each corner has an indentation for a cigarette with a nice scalloped edge  and slightly raised design inside the ashtray (the large outer square inside the round is raised, the center with the smaller squares is under a flat glass).  It is in nice condition with no flaws noted.

Glass Ashtray Vintage