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 ZS3 and Ricoh WG-20 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS3 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 229 g (0.50 lb / 8.08 oz) (including batteries). Ricoh WG-20 has external dimensions of 114 x 58 x 28 mm (4.49 x 2.28 x 1.1″) and weighs 164 g (0.36 lb / 5.78 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS3 and the Ricoh WG-20. Ricoh WG-20 is 2mm shorter and 5mm thinner than Panasonic ZS3 but it is also 11mm wider.
Here is the back view size comparison of the Panasonic ZS3 and Ricoh WG-20.
Now lets look at the top view comparison of Panasonic ZS3 and Ricoh WG-20.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Ricoh WG-20 is significantly lighter (65g ) than the Panasonic ZS3 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the WG-20, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the ZS3.
LCD Screen Size and Features
Panasonic ZS3's 3.00" LCD screen is slightly larger than Ricoh WG-20's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.