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 Panasonic TS2 and Olympus E-PM1 side-by-side from the front, back and top in their relative dimensions. Panasonic TS2 has external dimensions of 99 x 63 x 24 mm (3.9 x 2.48 x 0.94″) and weighs 188 g (0.41 lb / 6.63 oz) (including batteries). Olympus E-PM1 has external dimensions of 110 x 64 x 34 mm (4.33 x 2.52 x 1.34″) and weighs 265 g (0.58 lb / 9.35 oz) (including batteries).
Below you can see the front view size comparison of Panasonic TS2 and Olympus E-PM1. Panasonic TS2 is clearly the smaller of the two cameras. Its body is 11mm narrower, 1mm shorter and 10mm thinner than Olympus E-PM1. As you can tell, actually this is not a fair size comparison since Panasonic TS2 has a built-in lens but Olympus E-PM1 doesn't. Once you put a lens on E-PM1, its thickness will increase significantly.
Here is the back view size comparison of Panasonic TS2 and Olympus E-PM1.
Now lets look at the top view comparison of Panasonic TS2 and Olympus E-PM1.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic TS2 is significantly lighter (77g ) than the Olympus E-PM1 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 E-PM1, the total kit will weigh much higher.
LCD Screen Size and Features
Olympus E-PM1's 3" LCD screen is slightly larger than Panasonic TS2's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.