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 Olympus SZ-12 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). Olympus SZ-12 has external dimensions of 106 x 69 x 40 mm (4.17 x 2.72 x 1.57″) and weighs 226 g (0.50 lb / 7.97 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Olympus SZ-12. Nikon L31 is clearly the smaller of the two cameras. Its body is 10mm narrower, 10mm shorter and 11mm thinner than Olympus SZ-12.
Now lets look at the top view comparison of Nikon L31 and Olympus SZ-12.
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 (66g ) than the Olympus SZ-12 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Olympus SZ-12 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
Olympus SZ-12'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.