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 Canon 700D and Canon 600D side-by-side from the front, back and top in their relative dimensions. Canon 700D has external dimensions of 133 x 100 x 79 mm (5.24 x 3.94 x 3.11″) and weighs 580 g (1.28 lb / 20.46 oz) (including batteries). Canon 600D has external dimensions of 133 x 100 x 80 mm (5.24 x 3.94 x 3.15″) and weighs 570 g (1.26 lb / 20.11 oz) (including batteries).
Below you can see the front-view size comparison of the Canon 700D and the Canon 600D. Canon 700D has the same height and width with Canon 600D. On the other hand, with a thickness of 79mm, it is 1mm thinner.
Here is the back view size comparison of the Canon 700D and Canon 600D.
Now lets look at the top view comparison of Canon 700D and Canon 600D.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon 600D is 10g lighter than the Canon 700D but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since both Canon 700D and Canon 600D have the same Canon EF/EF-S lens mount and APS-C sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Unfortunately neither the Canon EOS 700D (EOS Rebel T5i) nor Canon EOS 600D (EOS Rebel T3i / EOS Kiss X5) 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 DSLR Cameras with Weather Sealing
LCD Screen Size and Features
Canon 700D and Canon 600D's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.