Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Nikon S9100 and Canon ELPH 140 IS side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Canon ELPH 140 IS has external dimensions of 95 x 54 x 22 mm (3.74 x 2.13 x 0.87″) and weighs 127 g (0.28 lb / 4.48 oz) (including batteries).
Below you can see the front view size comparison of Nikon S9100 and Canon ELPH 140 IS. Canon ELPH 140 IS is clearly the smaller of the two cameras. Its body is 10mm narrower, 8mm shorter and 13mm thinner than Nikon S9100.
Here is the back view size comparison of Nikon S9100 and Canon ELPH 140 IS.
Now lets look at the top view comparison of Nikon S9100 and Canon ELPH 140 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 140 IS is significantly lighter (87g ) than the Nikon S9100 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S9100 nor Canon PowerShot ELPH 140 IS (IXUS 150) provides any type of weather sealing in their body, 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
Nikon S9100's 3.00" LCD screen is slightly larger than Canon ELPH 140 IS's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.