Pentax K-m weighs 590 g (1.30 lb / 20.81 oz) and has external dimensions of 123 x 92 x 68 mm (4.84 x 3.62 x 2.68″). Considering that the average weight of DSLR type cameras is 773g, Pentax K-m is a remarkably light camera for its class. With a thickness of 68mm, it has an average thickness for its class.
Here is the front and top view image of Pentax K-m with the dimensions:
In order to give you a better idea about the real life size of Pentax K-m, 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 Pentax K-m with its main competitors:
Pentax K-m 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.