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 A9 II and Panasonic S1H side-by-side from the front, back and top in their relative dimensions. Sony A9 II has external dimensions of 129 x 96 x 76 mm (5.08 x 3.78 x 2.99″) and weighs 678 g (1.49 lb / 23.92 oz) (including batteries). Panasonic S1H has external dimensions of 151 x 114 x 110 mm (5.94 x 4.49 x 4.33″) and weighs 1052 g (2.32 lb / 37.11 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A9 II and the Panasonic S1H. Sony A9 II is clearly the smaller of the two cameras. Its body is 22mm narrower, 18mm shorter and 34mm thinner than Panasonic S1H.
Here is the back view size comparison of the Sony A9 II and Panasonic S1H.
Now lets look at the top view comparison of Sony A9 II and Panasonic S1H.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A9 II is significantly lighter (374g ) than the Panasonic S1H 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 A9 II and Panasonic S1H 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 A9 Mark II and the S1H have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Panasonic S1H's 3.20" LCD screen is slightly larger than Sony A9 II's 3 screen.