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 Sony A6600 and Olympus E-M5 III side-by-side from the front, back and top in their relative dimensions. Sony A6600 has external dimensions of 120 x 67 x 69 mm (4.72 x 2.64 x 2.72″) and weighs 503 g (1.11 lb / 17.74 oz) (including batteries). Olympus E-M5 III has external dimensions of 125 x 85 x 50 mm (4.92 x 3.35 x 1.97″) and weighs 414 g (0.91 lb / 14.60 oz) (including batteries).
Below you can see the front view size comparison of Sony A6600 and Olympus E-M5 III. Sony A6600 is 5mm narrower and 18mm shorter than Olympus E-M5 III but it is also 19mm thicker.
Here is the back view size comparison of Sony A6600 and Olympus E-M5 III.
Now lets look at the top view comparison of Sony A6600 and Olympus E-M5 III.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus E-M5 III is significantly lighter (89g ) than the Sony A6600 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 A6600 has an APS-C sized sensor and Olympus E-M5 III has a smaller Four Thirds sensor, Olympus E-M5 III's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A6600 lenses.
Both A6600 and E-M5 Mark III have weather sealings in their body, making them resistant to water and dust.
LCD Screen Size and Features
Sony A6600 and Olympus E-M5 III's LCD screens has the same diagonal size of 3".
Sony A6600 features a Tilting only screen
which is mostly only good for shooting from waist or over the head levels. On the other hand, Olympus E-M5 III sports a Fully Articulated screen
which is more flexible and useful especially for taking Selfie shots and video.