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 L31 and Pentax X70 side-by-side from the front, back and top in their relative dimensions. Nikon L31 has external dimensions of 96 x 59 x 29 mm (3.78 x 2.32 x 1.14″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries). Pentax X70 has external dimensions of 110 x 83 x 90 mm (4.33 x 3.27 x 3.54″) and weighs 410 g (0.90 lb / 14.46 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Pentax X70. Nikon L31 is clearly the smaller of the two cameras. Its body is 14mm narrower, 24mm shorter and 61mm thinner than Pentax X70.
Here is the back view size comparison of Nikon L31 and Pentax X70.
Now lets look at the top view comparison of Nikon L31 and Pentax X70.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon L31 is significantly lighter (250g ) than the Pentax X70 which may become a big advantage especially on long walking trips.
Unfortunately neither Nikon Coolpix L31 nor Pentax X70 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 Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Nikon L31 and Pentax X70's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.