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 G5 X and Canon A3400 IS side-by-side from the front, back and top in their relative dimensions. Canon G5 X has external dimensions of 112 x 76 x 44 mm (4.41 x 2.99 x 1.73″) and weighs 353 g (0.78 lb / 12.45 oz) (including batteries). Canon A3400 IS has external dimensions of 94 x 56 x 21 mm (3.7 x 2.2 x 0.83″) and weighs 126 g (0.28 lb / 4.44 oz) (including batteries).
Below you can see the front view size comparison of Canon G5 X and Canon A3400 IS. Canon A3400 IS is clearly the smaller of the two cameras. Its body is 18mm narrower, 20mm shorter and 23mm thinner than Canon G5 X.
Here is the back view size comparison of Canon G5 X and Canon A3400 IS.
Now lets look at the top view comparison of Canon G5 X and Canon A3400 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon A3400 IS is significantly lighter (227g ) than the Canon G5 X which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot G5 X nor Canon PowerShot A3400 IS 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
LCD Screen Size and Features
Canon G5 X and Canon A3400 IS's LCD screens has the same diagonal size of 3".
On the other hand, Canon G5 X 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. Canon A3400 IS's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to G5 X.