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 FH3 and Panasonic ZR3 side-by-side from the front, back and top in their relative dimensions. Panasonic FH3 has external dimensions of 98 x 55 x 24 mm (3.86 x 2.17 x 0.94″) and weighs 165 g (0.36 lb / 5.82 oz) (including batteries). Panasonic ZR3 has external dimensions of 98 x 55 x 26 mm (3.86 x 2.17 x 1.02″) and weighs 159 g (0.35 lb / 5.61 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FH3 and the Panasonic ZR3. Panasonic FH3 has the same height and width with Panasonic ZR3. On the other hand, with a thickness of 24mm, it is 2mm thinner.
Comparison image of the Panasonic FH3 and the Panasonic ZR3 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Panasonic FH3 and Panasonic ZR3.
Comparison image of the Panasonic FH3 and the Panasonic ZR3 Size and Weight - Back View
Now lets look at the top view comparison of Panasonic FH3 and Panasonic ZR3.
Top View Comparison image of the Panasonic FH3 and the Panasonic ZR3 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZR3 is 6g lighter than the Panasonic FH3 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FH3 (Lumix DMC-FS11) nor Panasonic Lumix DMC-ZR3 (Lumix DMC-ZX3) 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 FH3 and Panasonic ZR3'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.