Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Panasonic ZS1 and Canon S120 side-by-side from the front, back and top in their relative dimensions. 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). 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).
Below you can see the front view size comparison of Panasonic ZS1 and Canon S120. 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 Panasonic ZS1 and Canon S120.
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.
Unfortunately neither Panasonic Lumix DMC-ZS1 (Lumix DMC-TZ6) nor Canon PowerShot S120 provides any type of weather sealing in their body, 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" 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.