Pentax K-500 weighs 646 g (1.42 lb / 22.79 oz) and has external dimensions of 130 x 97 x 71 mm (5.12 x 3.82 x 2.8″). Considering that the average weight of DSLR type cameras is 774g, Pentax K-500 is a remarkably light camera for its class. With a thickness of 71mm, it has an average thickness for its class.
Here is the front and top view image of Pentax K-500 with the dimensions:
In order to give you a better idea about the real life size of Pentax K-500, 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 Pentax K-500 with its main competitors:
Pentax K-500 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.