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 Nikon 1 J4 and Olympus TG-3 side-by-side from the front, back and top in their relative dimensions. Nikon 1 J4 has external dimensions of 100 x 60 x 29 mm (3.92 x 2.36 x 1.12″) and weighs 232 g (0.51 lb / 8.18 oz) (including batteries). Olympus TG-3 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 Nikon 1 J4 and the Olympus TG-3. Nikon 1 J4 is clearly the smaller of the two cameras. Its body is 12mm narrower, 6mm shorter and 2mm thinner than Olympus TG-3. As you can tell, actually this is not a fair size comparison since Olympus TG-3 has a built-in lens but Nikon 1 J4 doesn't. Once you put a lens on 1 J4, its thickness will increase significantly.
Here is the back view size comparison of the Nikon 1 J4 and Olympus TG-3.
Now lets look at the top view comparison of Nikon 1 J4 and Olympus TG-3.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon 1 J4 is 15g lighter than the Olympus TG-3 but we don't think this will make a significant difference.
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 1 J4, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the TG-3, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the 1 J4.
LCD Screen Size and Features
Nikon 1 J4 and Olympus TG-3'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.