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-M10 IV and Fujifilm X-A7 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). Fujifilm X-A7 has external dimensions of 119 x 68 x 41 mm (4.69 x 1.5 x 1.61″) and weighs 320 g (0.71 lb / 11.29 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M10 IV and the Fujifilm X-A7. Fujifilm X-A7 is clearly the smaller of the two cameras. Its body is 3mm narrower, 16mm shorter and 8mm thinner than Olympus E-M10 IV.
Here is the back view size comparison of the Olympus E-M10 IV and Fujifilm X-A7.
Now lets look at the top view comparison of Olympus E-M10 IV and Fujifilm X-A7.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Fujifilm X-A7 is significantly lighter (63g ) than the Olympus E-M10 IV 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-A7 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-A7 lenses.
Unfortunately neither the Olympus OM-D E-M10 IV nor Fujifilm X-A7 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-A7's 3.50" LCD screen is slightly larger than Olympus E-M10 IV's 3 screen.