The tray is 10-1/2 inches in diameter. This relish has 4 pieces: 3 removable triangle dishes and one tray to hold them. Shown in Kovar Westmoreland Glass book 3, p. 243. She states no sizes were given in 1924 catalog and that US Glass produced a similar relish #8831, also with no sizes given. Telling one from the other is based on color and decoration.
The decoration on this relish combines cutting on the crystal triangles and black cased glass lip of the dish along with silver deposit resemble Westmoreland decorations.