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 Casio EX-ZR15 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). Casio EX-ZR15 has external dimensions of 102 x 59 x 27 mm (4.02 x 2.32 x 1.06″) and weighs 176 g (0.39 lb / 6.21 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Casio EX-ZR15.
Here is the back view size comparison of Nikon L31 and Casio EX-ZR15.
Now lets look at the top view comparison of Nikon L31 and Casio EX-ZR15.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon L31 is 16g lighter than the Casio EX-ZR15 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix L31 nor Casio Exilim EX-ZR15 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
Casio EX-ZR15'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.