Olympus E-P3 weighs 369 g (0.81 lb / 13.02 oz) and has external dimensions of 122 x 69 x 34 mm (4.8 x 2.72 x 1.34″). Considering that the average weight of Mirrorless type cameras is 445g, Olympus E-P3 is a remarkably light camera for its class. Even better, with a thickness of only 34mm, it is also quite small, 16mm thinner than the average of its class.
Here is the front and top view image of Olympus E-P3 with the dimensions:
In order to give you a better idea about the real life size of Olympus E-P3, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Olympus E-P3 size with the camera that it replaced: Olympus E-P2. Olympus E-P3 is 1mm shorter and 2mm thinner than Olympus E-P2 but it is also 1mm wider.
Below you can find the comparison of the weight and thickness of Olympus E-P3 with its main competitors:
Olympus E-P3 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.