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 Canon 400D and FujiFilm XP10 side-by-side from the front, back and top in their relative dimensions. Canon 400D has external dimensions of 127 x 94 x 65 mm (5 x 3.7 x 2.56″) and weighs 556 g (1.23 lb / 19.61 oz) (including batteries). FujiFilm XP10 has external dimensions of 96 x 64 x 23 mm (3.78 x 2.52 x 0.91″) and weighs 135 g (0.30 lb / 4.76 oz) (including batteries).
Below you can see the front view size comparison of Canon 400D and FujiFilm XP10. FujiFilm XP10 is clearly the smaller of the two cameras. Its body is 31mm narrower, 30mm shorter and 42mm thinner than Canon 400D. As you can tell, actually this is not a fair size comparison since FujiFilm XP10 has a built-in lens but Canon 400D doesn't. Once you put a lens on 400D, its thickness will increase significantly.
Now lets look at the top view comparison of Canon 400D and FujiFilm XP10.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
FujiFilm XP10 is significantly lighter (421g ) than the Canon 400D which may become a big advantage especially on long walking trips.
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 400D, the total kit will weigh much higher.
LCD Screen Size and Features
FujiFilm XP10's 2.7" LCD screen is slightly larger than Canon 400D's 2.5" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.