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 ST90 and Sony TX66 side-by-side from the front, back and top in their relative dimensions. Samsung ST90 has external dimensions of 92 x 53 x 17 mm (3.62 x 2.09 x 0.67″) and weighs (including batteries). Sony TX66 has external dimensions of 93 x 54 x 13 mm (3.66 x 2.13 x 0.51″) and weighs 109 g (0.24 lb / 3.84 oz) (including batteries).
Below you can see the front view size comparison of Samsung ST90 and Sony TX66. Samsung ST90 is 1mm narrower and 1mm shorter than Sony TX66 but it is also 4mm thicker.
Here is the back view size comparison of Samsung ST90 and Sony TX66.
Now lets look at the top view comparison of Samsung ST90 and Sony TX66.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Samsung ST90 is 109g lighter than the Sony TX66 but we don't think this will make a significant difference.
Unfortunately neither Samsung ST90 nor Sony Cyber-shot DSC-TX66 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
Sony TX66's 3.3" LCD screen is slightly larger than Samsung ST90's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.