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 S5100 and Canon G16 side-by-side from the front, back and top in their relative dimensions. Nikon S5100 has external dimensions of 97 x 57 x 22 mm (3.82 x 2.24 x 0.87″) and weighs 132 g (0.29 lb / 4.66 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 Nikon S5100 and Canon G16. Nikon S5100 is clearly the smaller of the two cameras. Its body is 12mm narrower, 19mm shorter and 18mm thinner than Canon G16.
Here is the back view size comparison of Nikon S5100 and Canon G16.
Now lets look at the top view comparison of Nikon S5100 and Canon G16.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S5100 is significantly lighter (224g ) than the Canon G16 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix S5100 nor Canon PowerShot G16 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
Canon G16's 3" LCD screen is slightly larger than Nikon S5100's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.