9.5 in. wide. This pattern is shown on two other footed bowls and a vase on p. 204 of Hazel Marie Weatherman's "Colored Glass of the Depression Era," Book 1. One of those bowls is shown here in the Gallery and identified as Hocking #979 Prismatic or Swirl Rib: http://chataboutdg.com/gallery/details.php?image_id=3146
Although this pattern supposedly has but 3 pieces, it is likely that the bowl shown above is an additional piece.
