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 M10 and Nikon 1 J4 side-by-side from the front, back and top in their relative dimensions. Canon M10 has external dimensions of 108 x 67 x 35 mm (4.25 x 2.64 x 1.38″) and weighs 301 g (0.66 lb / 10.62 oz) (including batteries). Nikon 1 J4 has external dimensions of 100 x 60 x 29 mm (3.92 x 2.36 x 1.12″) and weighs 232 g (0.51 lb / 8.18 oz) (including batteries).
Below you can see the front view size comparison of Canon M10 and Nikon 1 J4. Nikon 1 J4 is clearly the smaller of the two cameras. Its body is 8mm narrower, 7mm shorter and 6mm thinner than Canon M10.
Here is the back view size comparison of Canon M10 and Nikon 1 J4.
Now lets look at the top view comparison of Canon M10 and Nikon 1 J4.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon 1 J4 is significantly lighter (69g ) than the Canon M10 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 have to also take into account the lenses that you will be using with these bodies. Since Canon M10 has an APS-C sized sensor and Nikon 1 J4 has a smaller 1' sensor, Nikon 1 J4's lenses for a similar focal length and aperture will generally be lighter and smaller than the Canon M10 lenses.
Unfortunately neither Canon EOS M10 nor Nikon 1 J4 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Canon M10 and Nikon 1 J4's LCD screens has the same diagonal size of 3.00".
On the other hand, Canon M10 features a Tilting screen
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Nikon 1 J4 has a fixed type screen which provides less flexibility in shooting positions compared to M10.