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 Panasonic FH25 and Panasonic SZ3 side-by-side from the front, back and top in their relative dimensions. 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). Panasonic SZ3 has external dimensions of 95 x 56 x 22 mm (3.74 x 2.2 x 0.87″) and weighs 126 g (0.28 lb / 4.44 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FH25 and the Panasonic SZ3. Panasonic SZ3 is clearly the smaller of the two cameras. Its body is 4mm narrower, 1mm shorter and 6mm thinner than Panasonic FH25.
Comparison image of the Panasonic FH25 and the Panasonic SZ3 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Panasonic FH25 and Panasonic SZ3.
Comparison image of the Panasonic FH25 and the Panasonic SZ3 Size and Weight - Back View
Now lets look at the top view comparison of Panasonic FH25 and Panasonic SZ3.
Top View Comparison image of the Panasonic FH25 and the Panasonic SZ3 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic SZ3 is significantly lighter (33g ) than the Panasonic FH25 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FH25 (Lumix DMC-FS35) nor Panasonic Lumix DMC-SZ3 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 FH25 and Panasonic SZ3'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.