Fostoria made their Mid Century Heirloom line of free form art glass from 1959 to 1970. This pretty turquoise blue piece was listed in their catalogs as a 6 inch hanky bowl. Due to the hand made nature, no two pieces were exactly alike. The actual measurements 5-3/4 inches wide by 2-3/4" high. In perfect condition with no damage or wear.
Fostoria Heirloom Blue Opalescent Handkerchief Bowl