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 Olympus E-M5 III and Panasonic GX8 side-by-side from the front, back and top in their relative dimensions. 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). Panasonic GX8 has external dimensions of 133 x 78 x 63 mm (5.24 x 3.07 x 2.48″) and weighs 487 g (1.07 lb / 17.18 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M5 III and the Panasonic GX8. Olympus E-M5 III is 8mm narrower and 13mm thinner than Panasonic GX8 but it is also 7mm taller.
Here is the back view size comparison of the Olympus E-M5 III and Panasonic GX8.
Now lets look at the top view comparison of Olympus E-M5 III and Panasonic GX8.
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 (73g ) than the Panasonic GX8 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 also have to take into account the lenses that you will be using with these bodies. Since both Olympus E-M5 III and Panasonic GX8 have the same Micro Four Thirds lens mount and Four Thirds sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Both the E-M5 Mark III and the GX8 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Olympus E-M5 III and Panasonic GX8's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.