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 Olympus SZ-30MR and Canon A810 side-by-side from the front, back and top in their relative dimensions. Olympus SZ-30MR has external dimensions of 106 x 69 x 40 mm (4.17 x 2.72 x 1.57″) and weighs 226 g (0.50 lb / 7.97 oz) (including batteries). Canon A810 has external dimensions of 95 x 62 x 30 mm (3.74 x 2.44 x 1.18″) and weighs 171 g (0.38 lb / 6.03 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus SZ-30MR and the Canon A810. Canon A810 is clearly the smaller of the two cameras. Its body is 11mm narrower, 7mm shorter and 10mm thinner than Olympus SZ-30MR.
Now lets look at the top view comparison of Olympus SZ-30MR and Canon A810.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon A810 is significantly lighter (55g ) than the Olympus SZ-30MR which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Olympus SZ-30MR nor Canon PowerShot A810 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
Olympus SZ-30MR's 3.00" LCD screen is slightly larger than Canon A810's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.