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 A100 and Panasonic FH25 side-by-side from the front, back and top in their relative dimensions. Nikon A100 has external dimensions of 95 x 59 x 20 mm (3.74 x 2.32 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries). Panasonic FH25 has external dimensions of 99 x 57 x 28 mm (3.9 x 2.24 x 1.1″) and weighs 159 g (0.35 lb / 5.61 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon A100 and the Panasonic FH25. Nikon A100 is 4mm narrower and 8mm thinner than Panasonic FH25 but it is also 2mm taller.
Here is the back view size comparison of the Nikon A100 and Panasonic FH25.
Now lets look at the top view comparison of Nikon A100 and Panasonic FH25.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon A100 is significantly lighter (40g ) than the Panasonic FH25 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix A100 nor Panasonic Lumix DMC-FH25 (Lumix DMC-FS35) 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
Nikon A100 and Panasonic FH25's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.