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-ZS5 and Panasonic ZS8 side-by-side from the front, back and top in their relative dimensions. Casio EX-ZS5 has external dimensions of 103 x 59 x 20 mm (4.06 x 2.32 x 0.79″) and weighs (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-ZS5 and the Panasonic ZS8. Casio EX-ZS5 is 2mm narrower and 13mm thinner than Panasonic ZS8 but it is also 1mm taller.
Here is the back view size comparison of the Casio EX-ZS5 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-ZS5 is 210g lighter than the Panasonic ZS8 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Casio Exilim EX-ZS5 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
Casio EX-ZS5 and Panasonic ZS8's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.