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 S5300 and Nikon P310 side-by-side from the front, back and top in their relative dimensions. Nikon S5300 has external dimensions of 97 x 58 x 21 mm (3.82 x 2.28 x 0.83″) and weighs 138 g (0.30 lb / 4.87 oz) (including batteries). Nikon P310 has external dimensions of 103 x 58 x 32 mm (4.06 x 2.28 x 1.26″) and weighs 194 g (0.43 lb / 6.84 oz) (including batteries).
Below you can see the front view size comparison of Nikon S5300 and Nikon P310. Nikon S5300 is 6mm narrower and 11mm thinner than Nikon S5300 but they have the same height of 58mm.
Here is the back view size comparison of Nikon S5300 and Nikon P310.
Now lets look at the top view comparison of Nikon S5300 and Nikon P310.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S5300 is significantly lighter (56g ) than the Nikon P310 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S5300 nor Nikon Coolpix P310 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 S5300 and Nikon P310'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.