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 Samsung TL225 and Casio EX-ZS15 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). Casio EX-ZS15 has external dimensions of 103 x 59 x 20 mm (4.06 x 2.32 x 0.79″) and weighs 154 g (including batteries).
Below you can see the front view size comparison of Samsung TL225 and Casio EX-ZS15. Samsung TL225 is 3mm narrower and 1mm thinner than Casio EX-ZS15 but it is also 1mm taller.
Here is the back view size comparison of Samsung TL225 and Casio EX-ZS15.
Now lets look at the top view comparison of Samsung TL225 and Casio EX-ZS15.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Casio EX-ZS15 is significantly lighter (33g ) than the Samsung TL225 which may become a big advantage especially on long walking trips.
Unfortunately neither Samsung TL225 (ST550) nor Casio Exilim EX-ZS15 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 Casio EX-ZS15's screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.