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 Nikon S3100 and Canon S110 side-by-side from the front, back and top in their relative dimensions. Nikon S3100 has external dimensions of 94 x 58 x 18 mm (3.7 x 2.28 x 0.71″) and weighs 118 g (0.26 lb / 4.16 oz) (including batteries). Canon S110 has external dimensions of 99 x 59 x 27 mm (3.9 x 2.32 x 1.06″) and weighs 198 g (0.44 lb / 6.98 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S3100 and the Canon S110. Nikon S3100 is clearly the smaller of the two cameras. Its body is 5mm narrower, 1mm shorter and 9mm thinner than Canon S110.
Here is the back view size comparison of the Nikon S3100 and Canon S110.
Now lets look at the top view comparison of Nikon S3100 and Canon S110.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S3100 is significantly lighter (80g ) than the Canon S110 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix S3100 nor Canon PowerShot S110 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Canon S110's 3.00" LCD screen is slightly larger than Nikon S3100's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.