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 Leica X-U 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). Leica X-U has external dimensions of 140 x 79 x 88 mm (5.51 x 3.11 x 3.46″) and weighs 635 g (1.40 lb / 22.40 oz) (including batteries).
Below you can see the front view size comparison of Olympus E-M10 IV and Leica X-U. Olympus E-M10 IV is 18mm narrower and 39mm thinner than Leica X-U but it is also 5mm taller. As you can tell, actually this is not a fair size comparison since Leica X-U 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 Leica X-U.
Now lets look at the top view comparison of Olympus E-M10 IV and Leica X-U.
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 significantly lighter (252g ) than the Leica X-U which may become a big advantage especially on long walking trips.
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.
LCD Screen Size and Features
Olympus E-M10 IV and Leica X-U's LCD screens has the same diagonal size of 3".
Olympus E-M10 IV features a Tilting only screen
which is mostly only good for shooting from waist or over the head levels. On the other hand, Leica X-U sports a Fully Articulated screen
which is more flexible and useful especially for taking Selfie shots and video.