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 Olympus FE-4000 and Casio EX-Z550 side-by-side from the front, back and top in their relative dimensions. Olympus FE-4000 has external dimensions of 95 x 57 x 22 mm (3.74 x 2.24 x 0.87″) and weighs 136 g (0.30 lb / 4.80 oz) (including batteries). Casio EX-Z550 has external dimensions of 99 x 53 x 20 mm (3.9 x 2.09 x 0.79″) and weighs 143 g (0.32 lb / 5.04 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus FE-4000 and the Casio EX-Z550. Casio EX-Z550 is 4mm shorter and 2mm thinner than Olympus FE-4000 but it is also 4mm wider.
Here is the back view size comparison of the Olympus FE-4000 and Casio EX-Z550.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Olympus FE-4000 is 7g lighter than the Casio EX-Z550 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Olympus FE-4000 (X-925) nor Casio Exilim EX-Z550 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
Olympus FE-4000 and Casio EX-Z550's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.