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 Pentax W90 and Nikon 1 AW1 side-by-side from the front, back and top in their relative dimensions. Pentax W90 has external dimensions of 108 x 59 x 25 mm (4.25 x 2.32 x 0.98″) and weighs 164 g (0.36 lb / 5.78 oz) (including batteries). Nikon 1 AW1 has external dimensions of 114 x 72 x 37 mm (4.47 x 2.81 x 1.46″) and weighs 356 g (0.78 lb / 12.6 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax W90 and the Nikon 1 AW1. Pentax W90 is clearly the smaller of the two cameras. Its body is 6mm narrower, 13mm shorter and 12mm thinner than Nikon 1 AW1. As you can tell, actually this is not a fair size comparison since Pentax W90 has a built-in lens but Nikon 1 AW1 doesn't. Once you put a lens on 1 AW1, its thickness will increase significantly.
Here is the back view size comparison of the Pentax W90 and Nikon 1 AW1.
Now lets look at the top view comparison of Pentax W90 and Nikon 1 AW1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax W90 is significantly lighter (192g ) than the Nikon 1 AW1 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on 1 AW1, the total kit will weigh much higher.
Weather Sealing
LCD Screen Size and Features
Nikon 1 AW1's 3.00" LCD screen is slightly larger than Pentax W90's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.