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 Canon SX400 IS 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). Canon SX400 IS has external dimensions of 104 x 69 x 80 mm (4.09 x 2.72 x 3.15″) and weighs 313 g (0.69 lb / 11.04 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Canon SX400 IS. Nikon L31 is clearly the smaller of the two cameras. Its body is 8mm narrower, 10mm shorter and 51mm thinner than Canon SX400 IS.
Here is the back view size comparison of Nikon L31 and Canon SX400 IS.
Now lets look at the top view comparison of Nikon L31 and Canon SX400 IS.
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 (153g ) than the Canon SX400 IS which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Canon PowerShot SX400 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 SX400 IS's 3.00" LCD screen is slightly larger than Nikon L31's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.