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 Casio EX-100 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). Casio EX-100 has external dimensions of 119x67x50 mm and weighs 389 g (including batteries).
Below you can see the front view size comparison of Nikon S9900 and Casio EX-100. Nikon S9900 is clearly the smaller of the two cameras. Its body is 7mm narrower, 1mm shorter and 10mm thinner than Casio EX-100.
Here is the back view size comparison of Nikon S9900 and Casio EX-100.
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 (100g ) than the Casio EX-100 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S9900 nor Casio Exilim EX-100 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
Casio EX-100's 3.5" LCD screen is slightly larger than Nikon S9900's 3" screen.