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 Sigma DP2 Quattro 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). Sigma DP2 Quattro has external dimensions of 161 x 67 x 82 mm (6.34 x 2.64 x 3.23″) and weighs 395 g (0.87 lb / 13.93 oz) (including batteries).
Below you can see the front-view size comparison of the Canon ELPH 150 IS and the Sigma DP2 Quattro. Canon ELPH 150 IS is clearly the smaller of the two cameras. Its body is 66mm narrower, 10mm shorter and 58mm thinner than Sigma DP2 Quattro.
Comparison image of the Canon ELPH 150 IS and the Sigma DP2 Quattro Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Canon ELPH 150 IS and Sigma DP2 Quattro.
Comparison image of the Canon ELPH 150 IS and the Sigma DP2 Quattro Size and Weight - Back View
Now lets look at the top view comparison of Canon ELPH 150 IS and Sigma DP2 Quattro.
Top View Comparison image of the Canon ELPH 150 IS and the Sigma DP2 Quattro Size
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 (253g ) than the Sigma DP2 Quattro which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon PowerShot ELPH 150 IS (IXUS 155) nor Sigma DP2 Quattro 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
Sigma DP2 Quattro'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.