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 Sony A68 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). Sony A68 has external dimensions of 143 x 104 x 81 mm (5.63 x 4.09 x 3.19″) and weighs 610 g (1.34 lb / 21.52 oz) (including batteries).
Below you can see the front view size comparison of Ricoh G900 and Sony A68. Ricoh G900 is clearly the smaller of the two cameras. Its body is 25mm narrower, 38mm shorter and 48mm thinner than Sony A68. As you can tell, actually this is not a fair size comparison since Ricoh G900 has a built-in lens but Sony A68 doesn't. Once you put a lens on A68, its thickness will increase significantly.
Here is the back view size comparison of Ricoh G900 and Sony A68.
Now lets look at the top view comparison of Ricoh G900 and Sony A68.
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 (363g ) than the Sony A68 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 A68, the total kit will weigh much higher.
LCD Screen Size and Features
Ricoh G900's 3" LCD screen is slightly larger than Sony A68's 2.7 screen.
On the other hand, Sony A68 LCD screen has a Tilting feature
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels. On the other hand, Ricoh G900 has a fixed type screen which provides less flexibility in shooting positions compared to A68.