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 Olympus E-M10 IV and Sony A6400 side-by-side from the front, back and top in their relative dimensions. Olympus E-M10 IV has external dimensions of 122 x 84 x 49 mm (4.8 x 3.31 x 1.93″) and weighs 383 g (0.84 lb / 13.51 oz) (including batteries). Sony A6400 has external dimensions of 120 x 67 x 60 mm (4.72 x 2.64 x 2.36″) and weighs 403 g (0.89 lb / 14.22 oz) (including batteries).
Below you can see the front view size comparison of Olympus E-M10 IV and Sony A6400. Sony A6400 is 2mm narrower and 17mm shorter than Olympus E-M10 IV but it is also 1mm thicker.
Here is the back view size comparison of Olympus E-M10 IV and Sony A6400.
Now lets look at the top view comparison of Olympus E-M10 IV and Sony A6400.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus E-M10 IV is 20g lighter than the Sony A6400 but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Sony A6400 has an APS-C sized sensor and Olympus E-M10 IV has a smaller Four Thirds sensor, Olympus E-M10 IV's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A6400 lenses.
Thanks to the weather sealed body of A6400, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to E-M10 IV.
LCD Screen Size and Features
Olympus E-M10 IV and Sony A6400's LCD screens has the same diagonal size of 3.00".
Both cameras feature Tilting screens
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels.