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 Samsung NX100 and Fujifilm X-A1 side-by-side from the front, back and top in their relative dimensions. Samsung NX100 has external dimensions of 120 x 71 x 35 mm (4.72 x 2.8 x 1.38″) and weighs 282 g (0.62 lb / 9.95 oz) (including batteries). Fujifilm X-A1 has external dimensions of 117 x 67 x 39 mm (4.6 x 2.62 x 1.54″) and weighs 330 g (0.73 lb / 11.64 oz) (including batteries).
Below you can see the front view size comparison of Samsung NX100 and Fujifilm X-A1. Fujifilm X-A1 is 3mm narrower and 4mm shorter than Samsung NX100 but it is also 4mm thicker.
Now lets look at the top view comparison of Samsung NX100 and Fujifilm X-A1.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Samsung NX100 is significantly lighter (48g ) than the Fujifilm X-A1 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 both Samsung NX100 and Fujifilm X-A1 have the same APS-C sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Unfortunately neither Samsung NX100 nor Fujifilm X-A1 provides any type of weather sealing in their body, 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
Samsung NX100 and Fujifilm X-A1's LCD screens has the same diagonal size of 3".
On the other hand, Fujifilm X-A1 features a Tilting screen
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Samsung NX100 has a fixed type screen which provides less flexibility in shooting positions compared to X-A1.