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 QX30 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 QX30 has external dimensions of 68 x 65 x 58 mm (2.68 x 2.56 x 2.28″) and weighs 193 g (0.43 lb / 6.81 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Sony QX30. Nikon L31 is 6mm shorter and 29mm thinner than Sony QX30 but it is also 28mm wider.
Here is the back view size comparison of Nikon L31 and Sony QX30.
Now lets look at the top view comparison of Nikon L31 and Sony QX30.
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 (33g ) than the Sony QX30 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Sony Cyber-shot DSC-QX30 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
Nikon L31's 2.7" LCD screen is slightly larger than Sony QX30's screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.