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 R1 and Sony A7 III side-by-side from the front, back and top in their relative dimensions. Canon R1 has external dimensions of 158 x 150 x 87 mm (6.22 x 5.91 x 3.43″) and weighs 1115 g (2.46 lb / 39.33 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 R1 and the Sony A7 III. Sony A7 III is clearly the smaller of the two cameras. Its body is 26mm narrower, 52mm shorter and 16mm thinner than Canon R1.
Comparison image of the Canon R1 and the Sony A7 III Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Canon R1 and Sony A7 III.
Comparison image of the Canon R1 and the Sony A7 III Size and Weight - Back View
Now lets look at the top view comparison of Canon R1 and Sony A7 III.
Top View Comparison image of the Canon R1 and the Sony A7 III Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A7 III is significantly lighter (465g ) than the Canon R1 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 both Canon R1 and Sony A7 III have the same Full frame sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Weather Sealing
Both the R1 and the A7 III have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Canon R1's 3.20" LCD screen is slightly larger than Sony A7 III's 3″ screen.