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 Canon ELPH 150 IS and Olympus SP-620 UZ side-by-side from the front, back and top in their relative dimensions. Canon ELPH 150 IS has external dimensions of 95 x 57 x 24 mm (3.74 x 2.24 x 0.94″) and weighs 142 g (0.31 lb / 5.01 oz) (including batteries). Olympus SP-620 UZ has external dimensions of 110 x 74 x 74 mm (4.33 x 2.91 x 2.91″) and weighs 435 g (including batteries).
Below you can see the front-view size comparison of the Canon ELPH 150 IS and the Olympus SP-620 UZ. Canon ELPH 150 IS is clearly the smaller of the two cameras. Its body is 15mm narrower, 17mm shorter and 50mm thinner than Olympus SP-620 UZ.
Here is the back view size comparison of the Canon ELPH 150 IS and Olympus SP-620 UZ.
Now lets look at the top view comparison of Canon ELPH 150 IS and Olympus SP-620 UZ.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 150 IS is significantly lighter (293g ) than the Olympus SP-620 UZ which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot ELPH 150 IS (IXUS 155) nor Olympus SP-620 UZ 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 SP-620 UZ's 3.00" LCD screen is slightly larger than Canon ELPH 150 IS's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.