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 S2900 and Canon ELPH 350 HS side-by-side from the front, back and top in their relative dimensions. Nikon S2900 has external dimensions of 95 x 59 x 20 mm (3.74 x 2.32 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries). Canon ELPH 350 HS has external dimensions of 100 x 58 x 23 mm (3.94 x 2.28 x 0.91″) and weighs 147 g (0.32 lb / 5.19 oz) (including batteries).
Below you can see the front view size comparison of Nikon S2900 and Canon ELPH 350 HS. Nikon S2900 is 5mm narrower and 3mm thinner than Canon ELPH 350 HS but it is also 1mm taller.
Here is the back view size comparison of Nikon S2900 and Canon ELPH 350 HS.
Now lets look at the top view comparison of Nikon S2900 and Canon ELPH 350 HS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S2900 is significantly lighter (28g ) than the Canon ELPH 350 HS which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S2900 nor Canon PowerShot ELPH 350 HS (IXUS 275 HS) 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
Canon ELPH 350 HS's 3" LCD screen is slightly larger than Nikon S2900's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.