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 510 HS and Canon G16 side-by-side from the front, back and top in their relative dimensions. Canon ELPH 510 HS has external dimensions of 99 x 59 x 22 mm (3.9 x 2.32 x 0.87″) and weighs 206 g (0.45 lb / 7.27 oz) (including batteries). Canon G16 has external dimensions of 109 x 76 x 40 mm (4.29 x 2.99 x 1.57″) and weighs 356 g (0.78 lb / 12.56 oz) (including batteries).
Below you can see the front-view size comparison of the Canon ELPH 510 HS and the Canon G16. Canon ELPH 510 HS is clearly the smaller of the two cameras. Its body is 10mm narrower, 17mm shorter and 18mm thinner than Canon G16.
Here is the back view size comparison of the Canon ELPH 510 HS and Canon G16.
Now lets look at the top view comparison of Canon ELPH 510 HS and Canon G16.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 510 HS is significantly lighter (150g ) than the Canon G16 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Canon ELPH 510 HS (IXUS 1100 HS) nor Canon PowerShot G16 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 510 HS's 3.20" LCD screen is slightly larger than Canon G16's 3 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.