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 G16 and Panasonic ZS1 side-by-side from the front, back and top in their relative dimensions. Canon G16 has external dimensions of 109 x 76 x 40 mm (4.29 x 2.99 x 1.57″) and weighs 356 g (0.78 lb / 12.56 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 G16 and the Panasonic ZS1. Panasonic ZS1 is clearly the smaller of the two cameras. Its body is 6mm narrower, 16mm shorter and 7mm thinner than Canon G16.
Here is the back view size comparison of the Canon G16 and Panasonic ZS1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS1 is significantly lighter (127g ) than the Canon G16 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot G16 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 G16'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.