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 SH-3 and Panasonic ZS70 side-by-side from the front, back and top in their relative dimensions. Olympus SH-3 has external dimensions of 109 x 63 x 42 mm (4.29 x 2.48 x 1.65″) and weighs 271 g (0.60 lb / 9.56 oz) (including batteries). Panasonic ZS70 has external dimensions of 112 x 67 x 41 mm (4.41 x 2.64 x 1.61″) and weighs 322 g (0.71 lb / 11.36 oz) (including batteries).
Below you can see the front view size comparison of Olympus SH-3 and Panasonic ZS70. Olympus SH-3 is 3mm narrower and 4mm shorter than Panasonic ZS70 but it is also 1mm thicker.
Here is the back view size comparison of Olympus SH-3 and Panasonic ZS70.
Now lets look at the top view comparison of Olympus SH-3 and Panasonic ZS70.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus SH-3 is significantly lighter (51g ) than the Panasonic ZS70 which may become a big advantage especially on long walking trips.
Unfortunately neither Olympus Stylus SH-3 nor Panasonic Lumix DMC-ZS70 (Lumix DC-TZ90) 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 SH-3 and Panasonic ZS70's LCD screens has the same diagonal size of 3".
On the other hand, Panasonic ZS70 features a Tilting screen
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Olympus SH-3 has a fixed type screen which provides less flexibility in shooting positions compared to ZS70.