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 Samsung TL225 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). Samsung TL225 has external dimensions of 100 x 60 x 19 mm (3.94 x 2.36 x 0.75″) and weighs 187 g (0.41 lb / 6.60 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS1 and Samsung TL225. Panasonic ZS1 has the same height with Samsung TL225. On the other hand, with a width of 103mm, it is 3 wider and also with a thickness of 33mm, it is 14mm thicker than Samsung TL225.
Here is the back view size comparison of Panasonic ZS1 and Samsung TL225.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Samsung TL225 is significantly lighter (42g ) than the Panasonic ZS1 which may become a big advantage especially on long walking trips.
Unfortunately neither Panasonic Lumix DMC-ZS1 (Lumix DMC-TZ6) nor Samsung TL225 (ST550) 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
Samsung TL225's 3.5" 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.