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 Canon S120 and Panasonic FS15 side-by-side from the front, back and top in their relative dimensions. Canon S120 has external dimensions of 100 x 59 x 29 mm (3.94 x 2.32 x 1.14″) and weighs 217 g (0.48 lb / 7.65 oz) (including batteries). Panasonic FS15 has external dimensions of 97 x 54 x 22 mm (3.82 x 2.13 x 0.87″) and weighs 136 g (0.30 lb / 4.80 oz) (including batteries).
Below you can see the front-view size comparison of the Canon S120 and the Panasonic FS15. Panasonic FS15 is clearly the smaller of the two cameras. Its body is 3mm narrower, 5mm shorter and 7mm thinner than Canon S120.
Here is the back view size comparison of the Canon S120 and Panasonic FS15.
Now lets look at the top view comparison of Canon S120 and Panasonic FS15.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic FS15 is significantly lighter (81g ) than the Canon S120 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot S120 nor Panasonic Lumix DMC-FS15 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 S120's 3.00" LCD screen is slightly larger than Panasonic FS15's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.