Hi Anne, Im interested to see you have a similar item in this pattern as a bowl. I also have a bowl with this pattern but its in a Marigold carnival finish, and is 5 inches across by 2 inches deep. The pattern is of a double row of interlocking diamonds - slightly different to the plate pattern, but I wondered if this could be just an adaptation to fit a small round bowl? The base star and the base ring also look similar to that on the plates. This is an unattributed Carnival item, so to be able to link it with the labelled Sowerby piece would be great