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 A2100 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 A2100 IS has external dimensions of 102 x 64 x 32 mm (4.02 x 2.52 x 1.26″) and weighs 185 g (0.41 lb / 6.53 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Canon A2100 IS. Nikon L31 is clearly the smaller of the two cameras. Its body is 6mm narrower, 5mm shorter and 3mm thinner than Canon A2100 IS.
Comparison image of Nikon L31 and Canon A2100 IS Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Nikon L31 and Canon A2100 IS.
Comparison image of Nikon L31 and Canon A2100 IS Size and Weight - Back View
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon L31 is 25g lighter than the Canon A2100 IS but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither Nikon Coolpix L31 nor Canon PowerShot A2100 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 A2100 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.