These are 9 5/8" dinner size plates. Note the squared ends on the "ribs" which are raised underneath and do not extend to the rim of the plate. The indented rings are not easily visible unless viewing from an angle. Has snapped up base or foot.
Pictured on pg. 86 of Fenton Glass The First Twenty-Five Years by William Heacock. The #631 9 1/2" Cake Plate is shown as part of a catalog page, circa 1921.
