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 135 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 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 Nikon P300 and the Canon ELPH 135. Canon ELPH 135 is clearly the smaller of the two cameras. Its body is 8mm narrower, 4mm shorter and 10mm thinner than Nikon P300.
Here is the back view size comparison of the Nikon P300 and Canon ELPH 135.
Now lets look at the top view comparison of Nikon P300 and Canon ELPH 135.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 135 is significantly lighter (62g ) than the Nikon P300 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix P300 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
Nikon P300'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.