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 ZS1 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 ZS1 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).
Below you can see the front-view size comparison of the Canon S120 and the Panasonic ZS1. Canon S120 is clearly the smaller of the two cameras. Its body is 3mm narrower, 1mm shorter and 4mm thinner than Panasonic ZS1.
Here is the back view size comparison of the Canon S120 and Panasonic ZS1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon S120 is 12g lighter than the Panasonic ZS1 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Canon PowerShot S120 nor Panasonic Lumix DMC-ZS1 (Lumix DMC-TZ6) 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 ZS1's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.