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 E85 and Olympus XZ-10 side-by-side from the front, back and top in their relative dimensions. Pentax E85 has external dimensions of 93 x 58 x 24 mm (3.66 x 2.28 x 0.94″) and weighs 145 g (0.32 lb / 5.11 oz) (including batteries). Olympus XZ-10 has external dimensions of 102 x 61 x 34 mm (4.03 x 2.41 x 1.35″) and weighs 221 g (0.49 lb / 7.80 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax E85 and the Olympus XZ-10. Pentax E85 is clearly the smaller of the two cameras. Its body is 9mm narrower, 3mm shorter and 10mm thinner than Olympus XZ-10.
Here is the back view size comparison of the Pentax E85 and Olympus XZ-10.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax E85 is significantly lighter (76g ) than the Olympus XZ-10 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Pentax Optio E85 nor Olympus Stylus XZ-10 provides any type of weather sealing in their bodies, 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
Olympus XZ-10's 3.00" LCD screen is slightly larger than Pentax E85's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.