Leica S2 weighs 1410 g (3.11 lb / 49.74 oz) and has external dimensions of 160 x 120 x 81 mm (6.3 x 4.72 x 3.19″). Considering that the average weight of DSLR type cameras is 774g, Leica S2 is a significantly heavy camera for its class. With a thickness of 81mm, it has an average thickness.
In order to give you a better idea about the real life size of Leica S2, we have added an image of how it looks next to a credit card and an AA type battery.
Now lets compare the weight and thickness of Leica S2 with its main competitors:
Leica S2 doesn't have any environmental sealings on its body so you got to be extra careful to protect it against water and dust. If you shoot under these conditions very often, consider checking Top DSLR Cameras with Weather Sealing page.