Farberware 4-Piece Square Glass Jars Set with Hanging Glass Lid Four jars are included in each set The jars are constructed of glass with metal hinges and are hand wash only Each jar has a hinged, locking lid to keep items inside secure All-glass construction makes the contents easy to identify Each jar measures approximately 3 inches in height The glass jars set comes with 4 jars. The jars are constructed of glass with metal hinges and are hand wash only. Each jar has a hinged, locking lid to keep items inside secure. All-glass construction makes the contents easy to identify. Each jar measures approximately 3 inches tall.