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 G7 X MIII and Sony A7 III side-by-side from the front, back and top in their relative dimensions. Canon G7 X MIII has external dimensions of 105 x 61 x 41 mm (4.13 x 2.4 x 1.61″) and weighs 304 g (0.67 lb / 10.72 oz) (including batteries). Sony A7 III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 650 g (1.43 lb / 22.93 oz) (including batteries).
Below you can see the front-view size comparison of the Canon G7 X MIII and the Sony A7 III. Canon G7 X MIII is clearly the smaller of the two cameras. Its body is 22mm narrower, 35mm shorter and 33mm thinner than Sony A7 III. As you can tell, actually this is not a fair size comparison since Canon G7 X MIII has a built-in lens but Sony A7 III doesn't. Once you put a lens on A7 III, its thickness will increase significantly.
Here is the back view size comparison of the Canon G7 X MIII and Sony A7 III.
Now lets look at the top view comparison of Canon G7 X MIII and Sony A7 III.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon G7 X MIII is significantly lighter (346g ) than the Sony A7 III 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 A7 III, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the A7 III, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the G7 X MIII.
LCD Screen Size and Features
Canon G7 X MIII and Sony A7 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.