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 IXUS 165 and Canon ELPH 150 IS side-by-side from the front, back and top in their relative dimensions. Canon IXUS 165 has external dimensions of 95 x 54 x 22 mm (3.74 x 2.13 x 0.87″) and weighs 128 g (0.28 lb / 4.52 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Canon IXUS 165 and the Canon ELPH 150 IS. Canon IXUS 165 has the same height with Canon ELPH 150 IS. On the other hand, with a width of 54mm, it is 3 narrower and also with a thickness of 22mm, it is 2mm thinner than Canon ELPH 150 IS.
Here is the back view size comparison of the Canon IXUS 165 and Canon ELPH 150 IS.
Now lets look at the top view comparison of Canon IXUS 165 and Canon ELPH 150 IS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon IXUS 165 is 14g lighter than the Canon ELPH 150 IS but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Canon IXUS 165 nor Canon PowerShot ELPH 150 IS (IXUS 155) 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
Canon IXUS 165 and Canon ELPH 150 IS's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.