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 Olympus E-M10 IV and Sony HX350 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). Sony HX350 has external dimensions of 130 x 93 x 103 mm (5.12 x 3.66 x 4.06″) and weighs 652 g (1.44 lb / 23.00 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-M10 IV and the Sony HX350. Olympus E-M10 IV is clearly the smaller of the two cameras. Its body is 8mm narrower, 9mm shorter and 54mm thinner than Sony HX350. As you can tell, actually this is not a fair size comparison since Sony HX350 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 the Olympus E-M10 IV and Sony HX350.
Now lets look at the top view comparison of Olympus E-M10 IV and Sony HX350.
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 (269g ) than the Sony HX350 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.
Weather Sealing
Unfortunately neither the Olympus OM-D E-M10 IV nor Sony Cyber-shot DSC-HX350 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 Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-M10 IV and Sony HX350's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Tilting screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels.