Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Canon G1 X III and Nikon D7200 side-by-side from the front, back and top in their relative dimensions. Canon G1 X III has external dimensions of 115 x 78 x 51 mm (4.53 x 3.07 x 2.01″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries). Nikon D7200 has external dimensions of 136 x 107 x 76 mm (5.35 x 4.21 x 2.99″) and weighs 765 g (1.49 lb / 23.81 oz) (including batteries).
Below you can see the front view size comparison of Canon G1 X III and Nikon D7200. Canon G1 X III is clearly the smaller of the two cameras. Its body is 21mm narrower, 29mm shorter and 25mm thinner than Nikon D7200. As you can tell, actually this is not a fair size comparison since Canon G1 X III has a built-in lens but Nikon D7200 doesn't. Once you put a lens on D7200, its thickness will increase significantly.
Here is the back view size comparison of Canon G1 X III and Nikon D7200.
Now lets look at the top view comparison of Canon G1 X III and Nikon D7200.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon G1 X III is significantly lighter (366g ) than the Nikon D7200 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 D7200, the total kit will weigh much higher.
Both G1 X III and D7200 have weather sealings in their body, making them resistant to water and dust.
LCD Screen Size and Features
Nikon D7200's 3.2" LCD screen is slightly larger than Canon G1 X III's 3" screen.
On the other hand, Canon G1 X III sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. On the other hand, Nikon D7200 has a fixed type screen which provides almost no flexibility in shooting positions compared to G1 X III.