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-S200 and Panasonic ZS8 side-by-side from the front, back and top in their relative dimensions. Casio EX-S200 has external dimensions of 100 x 55 x 18 mm (3.94 x 2.17 x 0.71″) and weighs 132 g (0.29 lb / 4.66 oz) (including batteries). Panasonic ZS8 has external dimensions of 105 x 58 x 33 mm (4.13 x 2.28 x 1.3″) and weighs 210 g (0.46 lb / 7.41 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-S200 and the Panasonic ZS8. Casio EX-S200 is clearly the smaller of the two cameras. Its body is 5mm narrower, 3mm shorter and 15mm thinner than Panasonic ZS8.
Here is the back view size comparison of the Casio EX-S200 and Panasonic ZS8.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-S200 is significantly lighter (78g ) than the Panasonic ZS8 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Casio Exilim EX-S200 nor Panasonic Lumix DMC-ZS8 (Lumix DMC-TZ18) 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
Panasonic ZS8's 3.00" LCD screen is slightly larger than Casio EX-S200's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.