Sony A300 weighs 632 g (1.39 lb / 22.29 oz)
and has external dimensions of 131 x 99 x 75 mm (5.16 x 3.9 x 2.95″)
. Considering that the average weight of DSLR type cameras is 773g, Sony A300 is a remarkably light camera for its class. With a thickness of 75mm, it has an average thickness for its class.
In order to give you a better idea about the real life size of Sony A300, 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 Sony A300 with its main competitors:
Sony A300 Size Compared to Main Competitors
Sony A300 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.