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 Canon ELPH 190 IS and Canon ELPH 140 IS side-by-side from the front, back and top in their relative dimensions. Canon ELPH 190 IS has external dimensions of 95 x 57 x 24 mm (3.74 x 2.24 x 0.94″) and weighs 138 g (0.30 lb / 4.87 oz) (including batteries). Canon ELPH 140 IS has external dimensions of 95 x 54 x 22 mm (3.74 x 2.13 x 0.87″) and weighs 127 g (0.28 lb / 4.48 oz) (including batteries).
Below you can see the front view size comparison of Canon ELPH 190 IS and Canon ELPH 140 IS.
Here is the back view size comparison of Canon ELPH 190 IS and Canon ELPH 140 IS.
Now lets look at the top view comparison of Canon ELPH 190 IS and Canon ELPH 140 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 140 IS is 11g lighter than the Canon ELPH 190 IS but we don't think this will make a significant difference.
Unfortunately neither Canon PowerShot ELPH 190 IS nor Canon PowerShot ELPH 140 IS (IXUS 150) 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
Canon ELPH 190 IS and Canon ELPH 140 IS's LCD screens has the same diagonal size of 2.70".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.