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 Leica C and Canon S100 side-by-side from the front, back and top in their relative dimensions. Leica C has external dimensions of 103 x 63 x 28 mm (4.06 x 2.48 x 1.1″) and weighs 195 g (0.43 lb / 6.88 oz) (including batteries). Canon S100 has external dimensions of 99 x 60 x 28 mm (3.9 x 2.36 x 1.1″) and weighs 198 g (0.44 lb / 6.98 oz) (including batteries).
Below you can see the front-view size comparison of the Leica C and the Canon S100. Canon S100 is 4mm narrower and 3mm shorter than Leica C but they have the same thickness of 28mm.
Comparison image of the Leica C and the Canon S100 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Leica C and Canon S100.
Comparison image of the Leica C and the Canon S100 Size and Weight - Back View
Now lets look at the top view comparison of Leica C and Canon S100.
Top View Comparison image of the Leica C and the Canon S100 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Leica C is 3g lighter than the Canon S100 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Leica C (Typ112) nor Canon PowerShot S100 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
Leica C and Canon S100's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.