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 Sony NEX-F3 and Sony NEX-C3 side-by-side from the front, back and top in their relative dimensions. Sony NEX-F3 has external dimensions of 117 x 67 x 42 mm (4.61 x 2.64 x 1.65″) and weighs 314 g (0.69 lb / 11.08 oz) (including batteries). Sony NEX-C3 has external dimensions of 110 x 60 x 33 mm (4.33 x 2.36 x 1.3″) and weighs 225 g (0.50 lb / 7.94 oz) (including batteries).
Below you can see the front view size comparison of Sony NEX-F3 and Sony NEX-C3. Sony NEX-C3 is clearly the smaller of the two cameras. Its body is 7mm narrower, 7mm shorter and 9mm thinner than Sony NEX-F3.
Here is the back view size comparison of Sony NEX-F3 and Sony NEX-C3.
Now lets look at the top view comparison of Sony NEX-F3 and Sony NEX-C3.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony NEX-C3 is significantly lighter (89g ) than the Sony NEX-F3 which may become a big advantage especially on long walking trips.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since both Sony NEX-F3 and Sony NEX-C3 have the same Sony E lens mount and APS-C sized sensors, lenses will not be a differentiator on total size of the system.
Unfortunately neither Sony Alpha NEX-F3 nor Sony Alpha NEX-C3 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Sony NEX-F3 and Sony NEX-C3's LCD screens has the same diagonal size of 3".
Both cameras feature Tilting screens
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels.