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 WG-6 and Sony a3500 side-by-side from the front, back and top in their relative dimensions. Ricoh WG-6 has external dimensions of 118 x 66 x 33 mm (4.65 x 2.6 x 1.3″) and weighs 246 g (0.54 lb / 8.68 oz) (including batteries). Sony a3500 has external dimensions of 128 x 91 x 85 mm (5.04 x 3.58 x 3.35″) and weighs 411 g (0.91 lb / 14.50 oz) (including batteries).
Below you can see the front view size comparison of Ricoh WG-6 and Sony a3500. Ricoh WG-6 is clearly the smaller of the two cameras. Its body is 10mm narrower, 25mm shorter and 52mm thinner than Sony a3500. As you can tell, actually this is not a fair size comparison since Ricoh WG-6 has a built-in lens but Sony a3500 doesn't. Once you put a lens on a3500, its thickness will increase significantly.
Now lets look at the top view comparison of Ricoh WG-6 and Sony a3500.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Ricoh WG-6 is significantly lighter (165g ) than the Sony a3500 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 a3500, the total kit will weigh much higher.
LCD Screen Size and Features
Ricoh WG-6 and Sony a3500's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.