Material Box: 304 Stainless Steel, 0.5 mm thick, straight & curled edges Lid: 4 mm Tempered Glass with Silicone Rim & Steam Release Valve Body Size Large: 18.6 × 13.4 × H6 cm (181 g) Medium: 17.1 × 11.8 × H5.2 cm (135 g) Small: 15.6 × 10.4 × H4.3 cm (102 g) Glass Lid Size Large: 18.6 × 13.3 × H1.4 cm (250 g) Medium: 17.1 × 11.7 × H1.4 cm (202 g) Small: 15.6 × 10.2 × H1.5 cm (160 g)