Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Fujifilm X-T1 and Sony A7S III side-by-side from the front, back and top in their relative dimensions. Fujifilm X-T1 has external dimensions of 129 x 90 x 47 mm (5.08 x 3.54 x 1.84″) and weighs 440 g (0.97 lb / 15.52 oz) (including batteries). Sony A7S III has external dimensions of 129 x 97 x 81 mm (5.08 x 3.82 x 3.19″) and weighs 699 g (1.54 lb / 24.66 oz) (including batteries).
Below you can see the front view size comparison of Fujifilm X-T1 and Sony A7S III. Fujifilm X-T1 has the same height with Sony A7S III. On the other hand, with a width of 90mm, it is 7 narrower and also with a thickness of 47mm, it is 34mm thinner than Sony A7S III.
Here is the back view size comparison of Fujifilm X-T1 and Sony A7S III.
Now lets look at the top view comparison of Fujifilm X-T1 and Sony A7S III.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Fujifilm X-T1 is significantly lighter (259g ) than the Sony A7S III 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 have to also take into account the lenses that you will be using with these bodies. Since Sony A7S III has a Full frame sensor and Fujifilm X-T1 has a smaller APS-C sensor, Fujifilm X-T1's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7S III lenses.
Both X-T1 and A7S III have weather sealings in their body, making them resistant to water and dust.
LCD Screen Size and Features
Fujifilm X-T1 and Sony A7S III's LCD screens has the same diagonal size of 3".