Double-sealing system prevents contents from drying or mixing. Lid features built-in gasket system for an airtight seal and locks on all four sides. Dense foam inlay included for a secure fit over individual wells. Includes (54) 1 3/16"w x 1 5/16"l small 1 oz. wells and (4) 1 3/16"w x 3"l large 2.4 oz. wells. Overall size: 9 3/4"w x 13 1/2"l.