Part 1 pot - 14 cm 5.50 inches. Part 2 pot - 16 cm 6.30 inches. Part 3 pot - 18 cm 7.08 inches. Part 4 pot - 20 cm 8.87 inches. Tinned and has been suitable for health.Do not wash in the machine. You can clean your copper pot with vinegar and salt. Dry with a soft cloth after washing. This item is made of copper.