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 Canon 6D and Olympus TG-4 side-by-side from the front, back and top in their relative dimensions. Canon 6D has external dimensions of 145 x 111 x 71 mm (5.71 x 4.37 x 2.8″) and weighs 770 g (1.70 lb / 27.16 oz) (including batteries). Olympus TG-4 has external dimensions of 112 x 66 x 31 mm (4.41 x 2.6 x 1.22″) and weighs 247 g (0.54 lb / 8.71 oz) (including batteries).
Below you can see the front-view size comparison of the Canon 6D and the Olympus TG-4. Olympus TG-4 is clearly the smaller of the two cameras. Its body is 33mm narrower, 45mm shorter and 40mm thinner than Canon 6D. As you can tell, actually this is not a fair size comparison since Olympus TG-4 has a built-in lens but Canon 6D doesn't. Once you put a lens on 6D, its thickness will increase significantly.
Here is the back view size comparison of the Canon 6D and Olympus TG-4.
Now lets look at the top view comparison of Canon 6D and Olympus TG-4.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Olympus TG-4 is significantly lighter (523g ) than the Canon 6D 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 6D, the total kit will weigh much higher.
Weather Sealing
LCD Screen Size and Features
Canon 6D and Olympus TG-4'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.