Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Canon SD940 IS and Nikon S31 side-by-side from the front, back and top in their relative dimensions. Canon SD940 IS has external dimensions of 89 x 55 x 20 mm (3.5 x 2.17 x 0.79″) and weighs 120 g (0.26 lb / 4.23 oz) (including batteries). Nikon S31 has external dimensions of 105 x 65 x 42 mm (4.13 x 2.56 x 1.65″) and weighs 185 g (0.41 lb / 6.53 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SD940 IS and the Nikon S31. Canon SD940 IS is clearly the smaller of the two cameras. Its body is 16mm narrower, 10mm shorter and 22mm thinner than Nikon S31.
Here is the back view size comparison of the Canon SD940 IS and Nikon S31.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon SD940 IS is significantly lighter (65g ) than the Nikon S31 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the S31, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the SD940 IS.
LCD Screen Size and Features
Canon SD940 IS and Nikon S31's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.