This is a matching set of six highly collectible Portmeirion side plates.
They are more of a shallow dish than a flat plate - as the rim area is raised from the center.
Each plate is 7 1/2 inches in diameter. The weight of all six plates is 1.5 kg
The design was by Susan Williams Ellis - and was only made for a short period from 1966 until 1970. They are all marked on the reverse.