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 Canon G16 and Olympus E-M10 III side-by-side from the front, back and top in their relative dimensions. Canon G16 has external dimensions of 109 x 76 x 40 mm (4.29 x 2.99 x 1.57″) and weighs 356 g (0.78 lb / 12.56 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 Canon G16 and the Olympus E-M10 III. Canon G16 is clearly the smaller of the two cameras. Its body is 13mm narrower, 8mm shorter and 10mm thinner than Olympus E-M10 III. As you can tell, actually this is not a fair size comparison since Canon G16 has a built-in lens but Olympus E-M10 III doesn't. Once you put a lens on E-M10 III, its thickness will increase significantly.
Here is the back view size comparison of the Canon G16 and Olympus E-M10 III.
Now lets look at the top view comparison of Canon G16 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.
Canon G16 is 54g lighter than the Olympus E-M10 III 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 III, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Canon PowerShot G16 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 Compact Cameras with Weather Sealing Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Canon G16 and Olympus E-M10 III's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Olympus E-M10 III 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 Canon G16 has a fixed type screen which provides less flexibility in shooting positions compared to E-M10 III.