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 Casio EX-FH25 and Canon 450D side-by-side from the front, back and top in their relative dimensions. Casio EX-FH25 has external dimensions of 122 x 81 x 83 mm (4.8 x 3.19 x 3.27″) and weighs 524 g (1.16 lb / 18.48 oz) (including batteries). Canon 450D has external dimensions of 129 x 98 x 62 mm (5.08 x 3.86 x 2.44″) and weighs 524 g (1.16 lb / 18.48 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-FH25 and the Canon 450D. Casio EX-FH25 is 7mm narrower and 17mm shorter than Canon 450D but it is also 21mm thicker. As you can tell, actually this is not a fair size comparison since Casio EX-FH25 has a built-in lens but Canon 450D doesn't. Once you put a lens on 450D, its thickness will increase significantly.
Here is the back view size comparison of the Casio EX-FH25 and Canon 450D.
Now lets look at the top view comparison of Casio EX-FH25 and Canon 450D.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-FH25 and Canon 450D have exactly the same weight of 524g.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on 450D, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Casio Exilim EX-FH25 nor Canon EOS 450D (EOS Rebel XSi / EOS Kiss X2) 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 Bridge Cameras with Weather Sealing Top DSLR Cameras with Weather Sealing
LCD Screen Size and Features
Casio EX-FH25 and Canon 450D's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.