Olympus E-P1 weighs 355 g (0.78 lb / 12.52 oz)
and has external dimensions of 121 x 70 x 36 mm (4.76 x 2.76 x 1.42″)
. Considering that the average weight of Mirrorless type cameras is 466g, Olympus E-P1 is a remarkably light camera for its class. Even better, with a thickness of only 36mm, it is also quite small, 17mm thinner than the average of its class.
In order to give you a better idea about the real life size of Olympus E-P1, we have added an image of how it looks next to a credit card and an AA type battery.
Below you can find the comparison of the weight and thickness of Olympus E-P1 with its main competitors:
Olympus E-P1 Size Compared to Main Competitors
Olympus E-P1 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 Mirrorless Cameras with Weather Sealing page.