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-A7 and Panasonic G100 side-by-side from the front, back and top in their relative dimensions. 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). Panasonic G100 has external dimensions of 116 x 83 x 54 mm (4.57 x 3.27 x 2.13″) and weighs 352 g (0.78 lb / 12.42 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm X-A7 and the Panasonic G100. Fujifilm X-A7 is 15mm shorter and 13mm thinner than Panasonic G100 but it is also 3mm wider.
Here is the back view size comparison of the Fujifilm X-A7 and Panasonic G100.
Now lets look at the top view comparison of Fujifilm X-A7 and Panasonic G100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Fujifilm X-A7 is 32g lighter than the Panasonic G100 but we don't think this will make a significant difference.
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 Panasonic G100 has a smaller Four Thirds sensor, Panasonic G100'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 Fujifilm X-A7 nor Panasonic Lumix DC-G100 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 Panasonic G100's 3 screen.