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 Canon G15 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). Canon G15 has external dimensions of 107 x 76 x 40 mm (4.21 x 2.99 x 1.57″) and weighs 352 g (0.78 lb / 12.42 oz) (including batteries).
Below you can see the front view size comparison of Casio EX-FC100 and Canon G15. Casio EX-FC100 is clearly the smaller of the two cameras. Its body is 7mm narrower, 17mm shorter and 17mm thinner than Canon G15.
Comparison image of Casio EX-FC100 and Canon G15 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Casio EX-FC100 and Canon G15.
Comparison image of Casio EX-FC100 and Canon G15 Size and Weight - Back View
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 (196g ) than the Canon G15 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither Casio Exilim EX-FC100 nor Canon PowerShot G15 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
Canon G15'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.