Nikon D5000 weighs 590 g (1.30 lb / 20.81 oz)
and has external dimensions of 127 x 104 x 80 mm (5 x 4.09 x 3.15″)
. Considering that the average weight of DSLR type cameras is 773g, Nikon D5000 is a remarkably light camera for its class. With a thickness of 80mm, it has an average thickness for its class.
In order to give you a better idea about the real life size of Nikon D5000, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Nikon D5000 size with the camera that it replaced: Nikon D60. Nikon D60 is clearly the smaller of the two cameras. Its body is 1mm narrower, 10mm shorter and 16mm thinner than Nikon D5000.
Below you can find the comparison of the weight and thickness of Nikon D5000 with its main competitors:
Nikon D5000 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.