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 A7 III 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 A7 III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 650 g (1.43 lb / 22.93 oz) (including batteries).
Below you can see the front view size comparison of Olympus E-M10 IV and Sony A7 III. Olympus E-M10 IV is clearly the smaller of the two cameras. Its body is 5mm narrower, 12mm shorter and 25mm thinner than Sony A7 III.
Here is the back view size comparison of Olympus E-M10 IV and Sony A7 III.
Now lets look at the top view comparison of Olympus E-M10 IV and Sony A7 III.
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 significantly lighter (267g ) than the Sony A7 III which may become a big advantage especially on long walking trips.
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 A7 III has a Full frame 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 A7 III lenses.
Thanks to the weather sealed body of A7 III, 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 A7 III'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.