This is a complete set often called a "tea for two" set - and was designed for a couple to have a light tea - with a little shared plate to put little fancies or nibbles on .. there was always only one sharing plate

Dimensions: the teapot from base to top of lid knop is 5 inches and from handle to spout is 8 1/3 inches. The main body section at the widest is 5 inches. Each cup is 3 1/2 inches in diameter and 2 1/2 inches in height. The saucers are 5 3/4 inches in diameter.  The side plate has a diameter of 6 inches. The open sugar bowl is 3 1/2 inches in diameter and 1 3/4 inches in height. The milk jug is 2 3/4 inches in height - handle to spout is 4 3/4 inches.