Pentax K-5 weighs 740 g (1.63 lb / 26.10 oz) and has external dimensions of 131 x 97 x 73 mm (5.16 x 3.82 x 2.87″). Considering that the average weight of DSLR type cameras is 774g, its weight is about average in its class. With a thickness of 73mm, it also has an average thickness.
Here is the front and top view image of Pentax K-5 with the dimensions:
In order to give you a better idea about the real life size of Pentax K-5, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Pentax K-5 size with the camera that it replaced: Pentax K-7. As depicted on the comparison image, and have the exact same height, width and thickness.
Below you can find the comparison of the weight and thickness of Pentax K-5 with its main competitors:
Pentax K-5 has environmental sealings on its body which makes it a weather resistant camera, providing resistance against the water and dust getting in to the camera. If you like outdoors photography and want to be able to use your camera in extreme conditions, Pentax K-5 will serve you well. If you attach one of these Pentax K-5 weather Sealed lenses to your camera, you will have a great all weather kit.