Sony A550 weighs 632 g (1.39 lb / 22.29 oz)
and has external dimensions of 137 x 104 x 84 mm (5.39 x 4.09 x 3.31″)
. Considering that the average weight of DSLR type cameras is 773g, Sony A550 is a remarkably light camera for its class. With a thickness of 84mm, it has an average thickness for its class.
Here is the front and top view image of Sony A550 with the dimensions:
In order to give you a better idea about the real life size of Sony A550, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Sony A550 size with the camera that it replaced: Sony A100. Sony A100 is clearly the smaller of the two cameras. Its body is 4mm narrower, 9mm shorter and 13mm thinner than Sony A550.
Below you can find the comparison of the weight and thickness of Sony A550 with its main competitors:
Sony A550 Size Compared to Main Competitors
Sony A550 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.