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 Sony NEX-5 and Olympus E-M10 III side-by-side from the front, back and top in their relative dimensions. Sony NEX-5 has external dimensions of 111 x 59 x 38 mm (4.37 x 2.32 x 1.5″) and weighs 287 g (0.63 lb / 10.12 oz) (including batteries). Olympus E-M10 III has external dimensions of 122 x 84 x 50 mm (4.8 x 3.31 x 1.97″) and weighs 410 g (0.90 lb / 14.46 oz) (including batteries).
Below you can see the front-view size comparison of the Sony NEX-5 and the Olympus E-M10 III. Sony NEX-5 is clearly the smaller of the two cameras. Its body is 11mm narrower, 25mm shorter and 12mm thinner than Olympus E-M10 III.
Here is the back view size comparison of the Sony NEX-5 and Olympus E-M10 III.
Now lets look at the top view comparison of Sony NEX-5 and Olympus E-M10 III.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony NEX-5 is significantly lighter (123g ) than the Olympus E-M10 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 also have to take into account the lenses that you will be using with these bodies. Since Sony NEX-5 has an APS-C sized sensor and Olympus E-M10 III has a smaller Four Thirds sensor, Olympus E-M10 III's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony NEX-5 lenses.
Weather Sealing
Unfortunately neither the Sony Alpha NEX-5 nor Olympus OM-D E-M10 Mark III 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
LCD Screen Size and Features
Sony NEX-5 and Olympus E-M10 III'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.