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 Sony W800 and Casio EX-ZR400 side-by-side from the front, back and top in their relative dimensions. Sony W800 has external dimensions of 97 x 55 x 21 mm (1.97 x 0.87 x 2.13″) and weighs 125 g (0.28 lb / 4.41 oz) (including batteries). Casio EX-ZR400 has external dimensions of 105 x 59 x 29 mm (4.13 x 2.32 x 1.14″) and weighs 205 g (0.45 lb / 7.23 oz) (including batteries).
Below you can see the front-view size comparison of the Sony W800 and the Casio EX-ZR400. Sony W800 is clearly the smaller of the two cameras. Its body is 8mm narrower, 4mm shorter and 8mm thinner than Casio EX-ZR400.
Here is the back view size comparison of the Sony W800 and Casio EX-ZR400.
Now lets look at the top view comparison of Sony W800 and Casio EX-ZR400.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony W800 is significantly lighter (80g ) than the Casio EX-ZR400 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Sony Cyber-shot DSC-W800 nor Casio Exilim EX-ZR400 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-ZR400's 3.00" LCD screen is slightly larger than Sony W800's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.