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 ST100 and Sony W290 side-by-side from the front, back and top in their relative dimensions. Samsung ST100 has external dimensions of 100 x 60 x 20 mm (3.94 x 2.36 x 0.79″) and weighs 155 g (0.34 lb / 5.47 oz) (including batteries). Sony W290 has external dimensions of 98 x 57 x 23 mm (3.86 x 2.24 x 0.91″) and weighs 167 g (0.37 lb / 5.89 oz) (including batteries).
Below you can see the front-view size comparison of the Samsung ST100 and the Sony W290. Sony W290 is 2mm narrower and 3mm shorter than Samsung ST100 but it is also 3mm thicker.
Here is the back view size comparison of the Samsung ST100 and Sony W290.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Samsung ST100 is 12g lighter than the Sony W290 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Samsung ST100 nor Sony Cyber-shot DSC-W290 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 ST100's 3.50" LCD screen is slightly larger than Sony W290's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.