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 350 HS and Canon ELPH 135 side-by-side from the front, back and top in their relative dimensions. Canon ELPH 350 HS has external dimensions of 100 x 58 x 23 mm (3.94 x 2.28 x 0.91″) and weighs 147 g (0.32 lb / 5.19 oz) (including batteries). Canon ELPH 135 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 the Canon ELPH 350 HS and the Canon ELPH 135. Canon ELPH 135 is clearly the smaller of the two cameras. Its body is 5mm narrower, 4mm shorter and 1mm thinner than Canon ELPH 350 HS.
Here is the back view size comparison of the Canon ELPH 350 HS and Canon ELPH 135.
Now lets look at the top view comparison of Canon ELPH 350 HS and Canon ELPH 135.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Weather Sealing
Unfortunately neither the Canon PowerShot ELPH 350 HS (IXUS 275 HS) nor Canon PowerShot ELPH 135 (IXUS 145) 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 ELPH 350 HS's 3.00" LCD screen is slightly larger than Canon ELPH 135's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.