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 G9 X and Nikon L820 side-by-side from the front, back and top in their relative dimensions. Canon G9 X has external dimensions of 98 x 58 x 31 mm (3.86 x 2.28 x 1.21″) and weighs 209 g (0.46 lb / 7.37 oz) (including batteries). Nikon L820 has external dimensions of 111 x 76 x 85 mm (4.37 x 2.99 x 3.35″) and weighs 470 g (1.04 lb / 16.58 oz) (including batteries).
Below you can see the front view size comparison of Canon G9 X and Nikon L820. Canon G9 X is clearly the smaller of the two cameras. Its body is 13mm narrower, 18mm shorter and 54mm thinner than Nikon L820.
Here is the back view size comparison of Canon G9 X and Nikon L820.
Now lets look at the top view comparison of Canon G9 X and Nikon L820.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon G9 X is significantly lighter (261g ) than the Nikon L820 which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot G9 X nor Nikon Coolpix L820 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Canon G9 X and Nikon L820's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.