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 170 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 170 IS has external dimensions of 100 x 58 x 23 mm (3.94 x 2.28 x 0.91″) and weighs 141 g (0.31 lb / 4.97 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Canon 170 IS. Canon 170 IS is 1mm shorter and 6mm thinner than Nikon L31 but it is also 4mm wider.
Here is the back view size comparison of Nikon L31 and Canon 170 IS.
Now lets look at the top view comparison of Nikon L31 and Canon 170 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon 170 IS is 19g lighter than the Nikon L31 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix L31 nor Canon PowerShot ELPH 170 IS (IXUS 170) 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 and Canon 170 IS's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.