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 Panasonic ZS8 and Panasonic ZS7 side-by-side from the front, back and top in their relative dimensions. 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). Panasonic ZS7 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries).
Below you can see the front view size comparison of Panasonic ZS8 and Panasonic ZS7.
Here is the back view size comparison of Panasonic ZS8 and Panasonic ZS7.
Now lets look at the top view comparison of Panasonic ZS8 and Panasonic ZS7.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS8 is 8g lighter than the Panasonic ZS7 but we don't think this will make a significant difference.
Unfortunately neither Panasonic Lumix DMC-ZS8 (Lumix DMC-TZ18) nor Panasonic Lumix DMC-ZS7 (Lumix DMC-TZ10) 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
Panasonic ZS8 and Panasonic ZS7's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.