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 PEN-F and Fujifilm X-A7 side-by-side from the front, back and top in their relative dimensions. Olympus PEN-F has external dimensions of 125 x 72 x 37 mm (4.92 x 2.83 x 1.46″) and weighs 427 g (0.94 lb / 15.06 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 PEN-F and the Fujifilm X-A7. Fujifilm X-A7 is 6mm narrower and 4mm shorter than Olympus PEN-F but it is also 4mm thicker.
Here is the back view size comparison of the Olympus PEN-F and Fujifilm X-A7.
Now lets look at the top view comparison of Olympus PEN-F 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 (107g ) than the Olympus PEN-F 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 PEN-F has a smaller Four Thirds sensor, Olympus PEN-F's lenses for a similar focal length and aperture will generally be lighter and smaller than the Fujifilm X-A7 lenses.
Weather Sealing
Unfortunately neither the Olympus PEN-F 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 PEN-F's 3 screen.