Material: Polyethylene, plastic bubble lining. Exterior Size: 4″ x 5″ 11X13cm Interior Size : 6.2″x 9″ 16x23cm. Exterior Size: 6″ x 7″ 15X18cm Interior Size : 5.1″x 7″ 13x18cm. Exterior Size: 7″ x 9 ” 18X23cm Interior Size : 6.2″x 9″ 16x23cm.