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-T200 and Sony a5100 side-by-side from the front, back and top in their relative dimensions. Fujifilm X-T200 has external dimensions of 121 x 84 x 55 mm (4.76 x 3.31 x 2.17″) and weighs 370 g (0.82 lb / 13.05 oz) (including batteries). Sony a5100 has external dimensions of 110 x 63 x 36 mm (4.33 x 2.48 x 1.42″) and weighs 283 g (0.62 lb / 9.98 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm X-T200 and the Sony a5100. Sony a5100 is clearly the smaller of the two cameras. Its body is 11mm narrower, 21mm shorter and 19mm thinner than Fujifilm X-T200.
Here is the back view size comparison of the Fujifilm X-T200 and Sony a5100.
Now lets look at the top view comparison of Fujifilm X-T200 and Sony a5100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony a5100 is significantly lighter (87g ) than the Fujifilm X-T200 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 Fujifilm X-T200 and Sony a5100 have the same APS-C sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Weather Sealing
Unfortunately neither the Fujifilm X-T200 nor Sony Alpha a5100 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-T200's 3.50" LCD screen is slightly larger than Sony a5100's 3″ screen.