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 Canon T6s and Canon T6i side-by-side from the front, back and top in their relative dimensions. Canon T6s has external dimensions of 132 x 101 x 78 mm (5.2 x 3.98 x 3.07″) and weighs 565 g (1.25 lb / 19.93 oz) (including batteries). Canon T6i has external dimensions of 132 x 101 x 78 mm (5.2 x 3.98 x 3.07″) and weighs 555 g (1.22 lb / 19.58 oz) (including batteries).
Below you can see the front view size comparison of Canon T6s and Canon T6i. In this case, we can see that Canon T6s and Canon T6i have the exact same height, width and thickness.
Comparison image of Canon T6s and Canon T6i Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Canon T6s and Canon T6i.
Comparison image of Canon T6s and Canon T6i Size and Weight - Back View
Now lets look at the top view comparison of Canon T6s and Canon T6i.
Top View Comparison image of Canon T6s and Canon T6i Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon T6i is 10g lighter than the Canon T6s 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 have to also take into account the lenses that you will be using with these bodies. Since both Canon T6s and Canon T6i 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 Canon EOS Rebel T6s (EOS 760D / EOS 8000D) nor Canon EOS Rebel T6i (EOS 750D / Kiss X8i) 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 DSLR Cameras with Weather Sealing
LCD Screen Size and Features
Canon T6s and Canon T6i's LCD screens has the same diagonal size of 3.00".
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 Selfie shots and video.