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 Olympus SZ-10 and Panasonic ZS40 side-by-side from the front, back and top in their relative dimensions. Olympus SZ-10 has external dimensions of 106 x 67 x 38 mm (4.17 x 2.64 x 1.5″) and weighs 215 g (0.47 lb / 7.58 oz) (including batteries). Panasonic ZS40 has external dimensions of 111 x 64 x 34 mm (4.37 x 2.52 x 1.34″) and weighs 240 g (0.53 lb / 8.47 oz) (including batteries).
Below you can see the front view size comparison of Olympus SZ-10 and Panasonic ZS40. Panasonic ZS40 is 3mm shorter and 4mm thinner than Olympus SZ-10 but it is also 5mm wider.
Here is the back view size comparison of Olympus SZ-10 and Panasonic ZS40.
Now lets look at the top view comparison of Olympus SZ-10 and Panasonic ZS40.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus SZ-10 is 25g lighter than the Panasonic ZS40 but we don't think this will make a significant difference.
Unfortunately neither Olympus SZ-10 nor Panasonic Lumix DMC-ZS40 (Lumix DMC-TZ60) 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
Olympus SZ-10 and Panasonic ZS40'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.