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 Samsung TL225 and Panasonic SZ3 side-by-side from the front, back and top in their relative dimensions. 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). Panasonic SZ3 has external dimensions of 95 x 56 x 22 mm (3.74 x 2.2 x 0.87″) and weighs 126 g (0.28 lb / 4.44 oz) (including batteries).
Below you can see the front-view size comparison of the Samsung TL225 and the Panasonic SZ3. Panasonic SZ3 is 5mm narrower and 4mm shorter than Samsung TL225 but it is also 3mm thicker.
Here is the back view size comparison of the Samsung TL225 and Panasonic SZ3.
Now lets look at the top view comparison of Samsung TL225 and Panasonic SZ3.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic SZ3 is significantly lighter (61g ) than the Samsung TL225 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Samsung TL225 (ST550) nor Panasonic Lumix DMC-SZ3 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
Samsung TL225's 3.50" LCD screen is slightly larger than Panasonic SZ3's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.