Canon SX40 HS weighs 600 g (1.32 lb / 21.16 oz) and has external dimensions of 123 x 92 x 108 mm (4.84 x 3.62 x 4.25″). Considering that the average weight of DSLR-Like type cameras is 591g, its weight is about average in its class. With a thickness of 108mm, it also has an average thickness.
Here is the front and top view image of Canon SX40 HS with the dimensions:
In order to give you a better idea about the real life size of Canon SX40 HS, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Canon SX40 HS size with the camera that it replaced: Canon SX30 IS. 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 Canon SX40 HS with its main competitors:
Canon SX40 HS Size Compared to Main Competitors
Canon SX40 HS 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 Bridge Cameras with Weather Sealing page.