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 Fujifilm X-T100 and Olympus E-M10 IV side-by-side from the front, back and top in their relative dimensions. Fujifilm X-T100 has external dimensions of 121 x 83 x 47 mm (4.76 x 3.27 x 1.85″) and weighs 448 g (0.99 lb / 15.80 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Fujifilm X-T100 and the Olympus E-M10 IV. Fujifilm X-T100 is clearly the smaller of the two cameras. Its body is 1mm narrower, 1mm shorter and 2mm thinner than Olympus E-M10 IV.
Here is the back view size comparison of the Fujifilm X-T100 and Olympus E-M10 IV.
Now lets look at the top view comparison of Fujifilm X-T100 and Olympus E-M10 IV.
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 (65g ) than the Fujifilm X-T100 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 Fujifilm X-T100 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 Fujifilm X-T100 lenses.
Weather Sealing
Unfortunately neither the Fujifilm X-T100 nor Olympus OM-D E-M10 IV provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Fujifilm X-T100 and Olympus E-M10 IV's LCD screens have the same diagonal size of 3.00 inches.
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.