The ash tray on the right in the light background is 6.25" wide. Note that the positioning of the indents for cigarettes is perpendicular to the center. Photos of this ash tray are by courtesy of Sandy McRae.
The ash tray on the left in the dark background is 4" wide. In this size, the cigarette indents are angled to the side. Photos of this ash tray are by courtesy of Suzanne Black.
Greensburg catalog pages shown in Weatherman's book "Colored Glass of the Depression Era 2" and in Tom Felt's book "L. E. Smith Glass Company" show only the large size.