Sony A330 weighs 529 g (1.17 lb / 18.66 oz)
and has external dimensions of 128 x 97 x 71 mm (5.04 x 3.82 x 2.8″)
. Considering that the average weight of DSLR type cameras is 773g, Sony A330 is a remarkably light camera for its class. With a thickness of 71mm, it has an average thickness for its class.
In order to give you a better idea about the real life size of Sony A330, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Sony A330 size with the camera that it replaced: Sony A300. Sony A330 is clearly the smaller of the two cameras. Its body is 3mm narrower, 2mm shorter and 4mm thinner than Sony A300.
Below you can find the comparison of the weight and thickness of Sony A330 with its main competitors:
Sony A330 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.