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 A7 and Nikon Z6 III side-by-side from the front, back and top in their relative dimensions. Sony A7 has external dimensions of 127 x 94 x 48 mm (5 x 3.7 x 1.89″) and weighs 474 g (1.04 lb / 16.72 oz) (including batteries). Nikon Z6 III has external dimensions of 139 x 102 x 74 mm (5.47 x 4.02 x 2.91″) and weighs 760 g (1.68 lb / 26.81 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A7 and the Nikon Z6 III. Sony A7 is clearly the smaller of the two cameras. Its body is 12mm narrower, 8mm shorter and 26mm thinner than Nikon Z6 III.
Comparison image of the Sony A7 and the Nikon Z6 III Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Sony A7 and Nikon Z6 III.
Comparison image of the Sony A7 and the Nikon Z6 III Size and Weight - Back View
Now lets look at the top view comparison of Sony A7 and Nikon Z6 III.
Top View Comparison image of the Sony A7 and the Nikon Z6 III Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A7 is significantly lighter (286g ) than the Nikon Z6 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 both Sony A7 and Nikon Z6 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 A7 and the Z6 Mark III have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Nikon Z6 III's 3.20" LCD screen is slightly larger than Sony A7's 3 screen.