This is a set of 11 Tiffany China Cobalt Blue and Gold double handled soup cup and saucer.
Beautiful Cobalt Blue and Gold China Cup and Saucer retailed by Tiffany & Co New York - Cauldon Ltd England Double Handled Cup & Saucer or measurements:  

Diameter:  5 1/4

Hight: 2 1/4

Across the rim:  3 1/2 

Length handle to handle 5 1/2