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 Sony W810 and Sony TX66 side-by-side from the front, back and top in their relative dimensions. Sony W810 has external dimensions of 97 x 56 x 21 mm (3.82 x 2.2 x 0.83″) and weighs 111 g (0.24 lb / 3.92 oz) (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 Sony W810 and Sony TX66. Sony TX66 is clearly the smaller of the two cameras. Its body is 4mm narrower, 2mm shorter and 8mm thinner than Sony W810.
Here is the back view size comparison of Sony W810 and Sony TX66.
Now lets look at the top view comparison of Sony W810 and Sony TX66.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony TX66 is 2g lighter than the Sony W810 but we don't think this will make a significant difference.
Unfortunately neither Sony Cyber-shot DSC-W810 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 Sony W810's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.