Heavy tank
The Char 2C was one of the largest tanks ever produced. At the start of World War II, France and the Soviet Union were the only countries to have inventories of heavy tanks, such as the Char B1, T-35, and KV-1. The Matilda II was designed under the British infantry tank concept which is similar to the heavy tank having thick armor and weighing more than their other tanks. It’s usually separate because they have less firepower with their cruiser tanks (comparable to mediums) at the time having the same main armament but more machine guns. Later war examples were the German Tiger I and II, as well as the Soviet IS series. Note that "heavy" versus "medium" is more a question of tactical roles than weight; the Panther, for example, was a "medium" tank that outweighed most Allied "heavy" tanks.
Char 2C
The Char 2C had a loaded weight of 69 tonnes, partly because of its armour, which was among the thickest of World War I-era tanks, but mostly because of its huge size. It is still easily the largest tank ever taken into production. With the tail fitted, the hull was over twelve metres long. Without tail, the hull length was 10.372 metres, the width 2.95 metres, the height 3.8 metres. Adding the cupola, normally detached for transport, brought height to 408 centimetres. The armour thickness was 30 mm at the front, 22 mm at the sides, 13 mm at the top and 10 mm at the bottom. In 1930 and 1931, the vehicles were rebuilt with a frontal armour of forty-five millimetres.