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 Panasonic 3D1 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). Panasonic 3D1 has external dimensions of 108 x 58 x 24 mm (4.25 x 2.28 x 0.94″) and weighs 193 g (0.43 lb / 6.81 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Panasonic 3D1. Panasonic 3D1 is 1mm shorter and 5mm thinner than Nikon L31 but it is also 12mm wider.
Here is the back view size comparison of Nikon L31 and Panasonic 3D1.
Now lets look at the top view comparison of Nikon L31 and Panasonic 3D1.
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 (33g ) than the Panasonic 3D1 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Panasonic Lumix DMC-3D1 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
Panasonic 3D1's 3.5" 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.