Olympus E-400 weighs 435 g (0.96 lb / 15.34 oz) and has external dimensions of 130 x 91 x 53 mm (5.12 x 3.58 x 2.09″). Considering that the average weight of DSLR type cameras is 769g, Olympus E-400 is a remarkably light camera for its class. Even better, with a thickness of only 53mm, it is also quite small, 23mm thinner than the average of its class.
Here is the front and top view image of Olympus E-400 with the dimensions:
In order to give you a better idea about the real life size of Olympus E-400, 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 Olympus E-400 with its main competitors:
Olympus E-400 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.