Sigma SD1 weighs and has external dimensions of 146 x 113 x 80 mm (5.75 x 4.45 x 3.15″). Considering that the average weight of DSLR type cameras is 769g, Sigma SD1 is a remarkably light camera for its class. With a thickness of 80mm, it has an average thickness for its class.
Here is the front and top view image of Sigma SD1 with the dimensions:
In order to give you a better idea about the real life size of Sigma SD1, we have added an image of how it looks next to a credit card and an AA type battery.
Now lets compare the weight and thickness of Sigma SD1 with its main competitors:
Sigma SD1 has environmental sealings on its body which makes it a weather resistant camera, providing resistance against the water and dust getting in to the camera. If you like outdoors photography and want to be able to use your camera in extreme conditions, Sigma SD1 will serve you well. If you attach one of these Sigma SD1 weather Sealed lenses to your camera, you will have a great all weather kit.