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 S9900 and Nikon P7800 side-by-side from the front, back and top in their relative dimensions. Nikon S9900 has external dimensions of 112 x 66 x 40 mm (4.41 x 2.6 x 1.57″) and weighs 289 g (0.64 lb / 10.19 oz) (including batteries). Nikon P7800 has external dimensions of 119 x 78 x 50 mm (4.69 x 3.07 x 1.97″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries).
Below you can see the front view size comparison of Nikon S9900 and Nikon P7800. Nikon S9900 is clearly the smaller of the two cameras. Its body is 7mm narrower, 12mm shorter and 10mm thinner than Nikon P7800.
Here is the back view size comparison of Nikon S9900 and Nikon P7800.
Now lets look at the top view comparison of Nikon S9900 and Nikon P7800.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S9900 is significantly lighter (110g ) than the Nikon P7800 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S9900 nor Nikon Coolpix P7800 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 S9900 and Nikon P7800's LCD screens has the same diagonal size of 3".
Both cameras feature Fully Articulating screens
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels. Fully articulating screens are also useful for taking Selfie shots and video.