Pentax S1 weighs 157 g (0.35 lb / 5.54 oz) and has external dimensions of 114 x 58 x 28 mm (4.49 x 2.28 x 1.1″). Considering that the average weight of Compact type cameras is 188g, Pentax S1 is a remarkably light camera for its class. With a thickness of 28mm, it has an average thickness for its class.
Here is the front and top view image of Pentax S1 with the dimensions:
In order to give you a better idea about the real life size of Pentax S1, 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 S1 with its main competitors:
Pentax S1 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 Compact Cameras with Weather Sealing page.