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 Olympus E-M10 IV and Fujifilm X100T side-by-side from the front, back and top in their relative dimensions. Olympus E-M10 IV has external dimensions of 122 x 84 x 49 mm (4.8 x 3.31 x 1.93″) and weighs 383 g (0.84 lb / 13.51 oz) (including batteries). Fujifilm X100T has external dimensions of 127 x 74 x 52 mm (5 x 2.91 x 2.05″) and weighs 440 g (0.97 lb / 15.52 oz) (including batteries).
Below you can see the front view size comparison of Olympus E-M10 IV and Fujifilm X100T. Olympus E-M10 IV is 5mm narrower and 3mm thinner than Fujifilm X100T but it is also 10mm taller. As you can tell, actually this is not a fair size comparison since Fujifilm X100T has a built-in lens but Olympus E-M10 IV doesn't. Once you put a lens on E-M10 IV, its thickness will increase significantly.
Here is the back view size comparison of Olympus E-M10 IV and Fujifilm X100T.
Now lets look at the top view comparison of Olympus E-M10 IV and Fujifilm X100T.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus E-M10 IV is 57g lighter than the Fujifilm X100T but we don't think this will make a significant difference.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on E-M10 IV, the total kit will weigh much higher.
Unfortunately neither Olympus OM-D E-M10 IV nor Fujifilm X100T 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 Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-M10 IV and Fujifilm X100T's LCD screens has the same diagonal size of 3".
On the other hand, Olympus E-M10 IV 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 Fujifilm X100T has a fixed type screen which provides less flexibility in shooting positions compared to E-M10 IV.