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 Casio EX-FC100 and Panasonic LF1 side-by-side from the front, back and top in their relative dimensions. Casio EX-FC100 has external dimensions of 100 x 59 x 23 mm (3.94 x 2.32 x 0.91″) and weighs 156 g (0.34 lb / 5.50 oz) (including batteries). Panasonic LF1 has external dimensions of 103 x 62 x 28 mm (4.06 x 2.44 x 1.1″) and weighs 192 g (0.42 lb / 6.77 oz) (including batteries).
Below you can see the front view size comparison of Casio EX-FC100 and Panasonic LF1. Casio EX-FC100 is clearly the smaller of the two cameras. Its body is 3mm narrower, 3mm shorter and 5mm thinner than Panasonic LF1.
Here is the back view size comparison of Casio EX-FC100 and Panasonic LF1.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Casio EX-FC100 is significantly lighter (36g ) than the Panasonic LF1 which may become a big advantage especially on long walking trips.
Unfortunately neither Casio Exilim EX-FC100 nor Panasonic Lumix DMC-LF1 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
LCD Screen Size and Features
Panasonic LF1's 3" LCD screen is slightly larger than Casio EX-FC100's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.