Canon S120 weighs 217 g (0.48 lb / 7.65 oz) and has external dimensions of 100 x 59 x 29 mm (3.94 x 2.32 x 1.14″). Considering that the average weight of Compact type cameras is 188g, its weight is about average in its class. With a thickness of 29mm, it also has an average thickness.
Here is the front and top view image of Canon S120 with the dimensions:
In order to give you a better idea about the real life size of Canon S120, 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 Canon S120 with its main competitors:
Canon S120 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.