Nikon D40 weighs
522 g (1.15 lb / 18.41 oz) and has external dimensions of
124 x 94 x 64 mm (4.88 x 3.7 x 2.52″). Considering that the average weight of DSLR type cameras is 773g, Nikon D40 is a remarkably light camera for its class. Even better, with a thickness of only 64mm, it is also quite small, 12mm thinner than the average of its class.
Weight Comparison
DSLR Cameras
Thickness Comparison
DSLR Cameras
Here is the front and top view image of Nikon D40 with the dimensions:
In order to give you a better idea about the real life size of Nikon D40, 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 Nikon D40 with its main competitors:
Nikon D40 Size Compared to Main Competitors
Weather Sealing
Nikon D40 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.