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 Nikon P300 and Canon ELPH 510 HS side-by-side from the front, back and top in their relative dimensions. Nikon P300 has external dimensions of 103 x 58 x 32 mm (4.06 x 2.28 x 1.26″) and weighs 189 g (0.42 lb / 6.67 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Nikon P300 and the Canon ELPH 510 HS. Canon ELPH 510 HS is 4mm narrower and 10mm thinner than Nikon P300 but it is also 1mm taller.
Here is the back view size comparison of the Nikon P300 and Canon ELPH 510 HS.
Now lets look at the top view comparison of Nikon P300 and Canon ELPH 510 HS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon P300 is 17g lighter than the Canon ELPH 510 HS but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Nikon Coolpix P300 nor Canon ELPH 510 HS (IXUS 1100 HS) 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 Nikon P300's 3 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.