This is a set of 3 Jadeite coffee cups and saucers. They are the heavy restaurant ware. The bottoms of the mugs say "Fire-King OVEN WARE MADE IN USA. They each also have a number on the bottom. One has a 5, one has a 10, and one has a 1. The bottoms of the saucers say "Fire-King OVEN WARE".
The saucers measure approx. 6 inches in diameter. The cups measure 2 7/8 inches tall and 3 1/8 inches in diameter across the top & 2 1/4 across the bottom.
They are in good shape, but do show wear. One of the cups has more wear than the other 2. It is worn on the handle and the rim. There are some tiny nicks on the handle and rim.