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 Ricoh G900 and Canon 600D side-by-side from the front, back and top in their relative dimensions. Ricoh G900 has external dimensions of 118 x 66 x 33 mm (4.65 x 2.6 x 1.3″) and weighs 247 g (0.54 lb / 8.71 oz) (including batteries). Canon 600D has external dimensions of 133 x 100 x 80 mm (5.24 x 3.94 x 3.15″) and weighs 570 g (1.26 lb / 20.11 oz) (including batteries).
Below you can see the front view size comparison of Ricoh G900 and Canon 600D. Ricoh G900 is clearly the smaller of the two cameras. Its body is 15mm narrower, 34mm shorter and 47mm thinner than Canon 600D. As you can tell, actually this is not a fair size comparison since Ricoh G900 has a built-in lens but Canon 600D doesn't. Once you put a lens on 600D, its thickness will increase significantly.
Here is the back view size comparison of Ricoh G900 and Canon 600D.
Now lets look at the top view comparison of Ricoh G900 and Canon 600D.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Ricoh G900 is significantly lighter (323g ) than the Canon 600D 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 600D, the total kit will weigh much higher.
LCD Screen Size and Features
Ricoh G900 and Canon 600D's LCD screens has the same diagonal size of 3".
On the other hand, Canon 600D sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. Ricoh G900's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to 600D.