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 Canon SX120 IS and Pentax X90 side-by-side from the front, back and top in their relative dimensions. Canon SX120 IS has external dimensions of 111 x 71 x 45 mm (4.37 x 2.8 x 1.77″) and weighs 285 g (0.63 lb / 10.05 oz) (including batteries). Pentax X90 has external dimensions of 111 x 85 x 110 mm (4.37 x 3.35 x 4.33″) and weighs 428 g (0.94 lb / 15.10 oz) (including batteries).
Below you can see the front view size comparison of Canon SX120 IS and Pentax X90. Canon SX120 IS has the same height with Pentax X90. On the other hand, with a width of 71mm, it is 14 narrower and also with a thickness of 45mm, it is 65mm thinner than Pentax X90.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon SX120 IS is significantly lighter (143g ) than the Pentax X90 which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot SX120 IS nor Pentax X90 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
Canon SX120 IS's 3" LCD screen is slightly larger than Pentax X90's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.