7" across, so these are salad / dessert plates. They might have been considered luncheon plates in the 1860s.
A few very minor pinpoint fleabites around the rims of three - its either fleabites or a pinpoint loss of paint. See images. Overall in exceptional antique condition.
This is the earliest 1860s set due to the rim being reddish brown and the original logo. It is also numbered for the 1860s design.