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 Nikon P300 and Nikon A 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). Nikon A has external dimensions of 111 x 64 x 40 mm (4.37 x 2.52 x 1.57″) and weighs 299 g (0.66 lb / 10.55 oz) (including batteries).
Below you can see the front view size comparison of Nikon P300 and Nikon A. Nikon P300 is clearly the smaller of the two cameras. Its body is 8mm narrower, 6mm shorter and 8mm thinner than Nikon A.
Here is the back view size comparison of Nikon P300 and Nikon A.
Now lets look at the top view comparison of Nikon P300 and Nikon A.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon P300 is significantly lighter (110g ) than the Nikon A which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix P300 nor Nikon Coolpix A 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
Nikon P300 and Nikon A's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.