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 Nikon A10 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). Nikon A10 has external dimensions of 96 x 59 x 29 mm (3.78 x 2.32 x 1.14″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries).
Below you can see the front view size comparison of Nikon S2900 and Nikon A10. Nikon S2900 is 1mm narrower and 9mm thinner than Nikon S2900 but they have the same height of 59mm.
Here is the back view size comparison of Nikon S2900 and Nikon A10.
Now lets look at the top view comparison of Nikon S2900 and Nikon A10.
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 (41g ) than the Nikon A10 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S2900 nor Nikon Coolpix A10 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 S2900 and Nikon A10's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.