Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Nikon L31 and Panasonic ZS7 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 ZS7 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon L31 and the Panasonic ZS7. Nikon L31 is clearly the smaller of the two cameras. Its body is 7mm narrower, 1mm shorter and 4mm thinner than Panasonic ZS7.
Here is the back view size comparison of the Nikon L31 and Panasonic ZS7.
Now lets look at the top view comparison of Nikon L31 and Panasonic ZS7.
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 (58g ) than the Panasonic ZS7 which may become a big advantage especially on long walking trips.
Unfortunately neither the Nikon Coolpix L31 nor Panasonic Lumix DMC-ZS7 (Lumix DMC-TZ10) provides any type of weather sealing in their bodies, 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 ZS7'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.