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 Canon A3400 IS 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). Canon A3400 IS has external dimensions of 94 x 56 x 21 mm (3.7 x 2.2 x 0.83″) 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 Canon A3400 IS. Canon A3400 IS is clearly the smaller of the two cameras. Its body is 5mm narrower, 1mm shorter and 7mm thinner than Panasonic FH25.
Here is the back view size comparison of the Panasonic FH25 and Canon A3400 IS.
Now lets look at the top view comparison of Panasonic FH25 and Canon A3400 IS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon A3400 IS 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 Canon PowerShot A3400 IS 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
Canon A3400 IS's 3.00" LCD screen is slightly larger than Panasonic FH25's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.