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 Casio EX-ZS15 and Sony TX66 side-by-side from the front, back and top in their relative dimensions. 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). 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 the Casio EX-ZS15 and the Sony TX66. Sony TX66 is clearly the smaller of the two cameras. Its body is 10mm narrower, 5mm shorter and 7mm thinner than Casio EX-ZS15.
Here is the back view size comparison of the Casio EX-ZS15 and Sony TX66.
Now lets look at the top view comparison of Casio EX-ZS15 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 significantly lighter (45g ) than the Casio EX-ZS15 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Casio Exilim EX-ZS15 nor Sony Cyber-shot DSC-TX66 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
Sony TX66's 3.30" 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.