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 Nikon L31 and Sony RX100 III side-by-side from the front, back and top in their relative dimensions. Nikon L31 has external dimensions of 96 x 59 x 29 mm (3.78 x 2.32 x 1.14″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries). Sony RX100 III has external dimensions of 102 x 58 x 41 mm (4.02 x 2.28 x 1.61″) and weighs 290 g (0.64 lb / 10.23 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Sony RX100 III. Nikon L31 is 6mm narrower and 12mm thinner than Sony RX100 III but it is also 1mm taller.
Here is the back view size comparison of Nikon L31 and Sony RX100 III.
Now lets look at the top view comparison of Nikon L31 and Sony RX100 III.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon L31 is significantly lighter (130g ) than the Sony RX100 III which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Sony Cyber-shot DSC-RX100 III 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
Sony RX100 III's 3 LCD screen is slightly larger than Nikon L31's 2.7" screen.
In addition to the size advantage, Sony RX100 III LCD screen also has a Tilting feature
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels. On the other hand, Nikon L31 has a fixed type screen which provides less flexibility in shooting positions compared to RX100 III.