Sony A68 weighs 610 g (1.34 lb / 21.52 oz) and has external dimensions of 143 x 104 x 81 mm (5.63 x 4.09 x 3.19″). Considering that the average weight of DSLR type cameras is 773g, Sony A68 is a remarkably light camera for its class. With a thickness of 81mm, it has an average thickness for its class.
Here is the front and top view image of Sony A68 with the dimensions:
In order to give you a better idea about the real life size of Sony A68, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Sony A68 size with the camera that it replaced: Sony A65. Sony A65 is 11mm narrower and 7mm shorter than Sony A68 but they have the same thickness of 81mm.
Below you can find the comparison of the weight and thickness of Sony A68 with its main competitors:
Sony A68 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.