Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the 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 the Nikon S9900 and the 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 the 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.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9900 nor Casio Exilim EX-100 provides any type of weather sealing in their bodies, 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 3.50" LCD screen is slightly larger than Nikon S9900's 3 screen.