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-Z450 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-Z450 has external dimensions of 81 x 56 x 21 mm (3.19 x 2.2 x 0.83″) and weighs 128 g (0.28 lb / 4.52 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Casio EX-Z450. Casio EX-Z450 is clearly the smaller of the two cameras. Its body is 15mm narrower, 3mm shorter and 8mm thinner than Nikon L31.
Comparison image of Nikon L31 and Casio EX-Z450 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Nikon L31 and Casio EX-Z450.
Comparison image of Nikon L31 and Casio EX-Z450 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.
Casio EX-Z450 is significantly lighter (32g ) than the Nikon L31 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither Nikon Coolpix L31 nor Casio Exilim EX-Z450 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-Z450'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.