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 Sony RX10 IV 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). Sony RX10 IV has external dimensions of 133 x 94 x 145 mm (5.24 x 3.7 x 5.71″) and weighs 1095 g (2.41 lb / 38.62 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A7 and the Sony RX10 IV. Sony A7 is 6mm narrower and 97mm thinner than Sony A7 but they have the same height of 94mm. As you can tell, actually this is not a fair size comparison since Sony RX10 IV has a built-in lens but Sony A7 doesn't. Once you put a lens on A7, its thickness will increase significantly.
Here is the back view size comparison of the Sony A7 and Sony RX10 IV.
Now lets look at the top view comparison of Sony A7 and Sony RX10 IV.
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 (621g ) than the Sony RX10 IV 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, the total kit will weigh much higher.
Weather Sealing
Both the A7 and the RX10 IV have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Sony A7 and Sony RX10 IV'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.