Size: 18cm. This De Buyer Inocuivre Saucepan is made from 90% copper and 10% AISI 304 stainless steel. The copper on the outside of the pan gives excellent thermal conductivity for perfect control when cooking and perfect heat diffusion giving exceptional cooking results. The low proportion of stainless steel on the inside does not alter the properties of copper. Riveted handles in cast stainless steel are comfortable and ergonomic. For all cooktops EXCEPT induction.