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 T7i and Canon T7 side-by-side from the front, back and top in their relative dimensions. Canon T7i has external dimensions of 131 x 100 x 76 mm (5.16 x 3.94 x 2.99″) and weighs 532 g (1.17 lb / 18.77 oz) (including batteries). Canon T7 has external dimensions of 129 x 101 x 78 mm (5.08 x 3.98 x 3.07″) and weighs 475 g (1.05 lb / 16.76 oz) (including batteries).
Below you can see the front view size comparison of Canon T7i and Canon T7. Canon T7i is 1mm shorter and 2mm thinner than Canon T7 but it is also 2mm wider.
Here is the back view size comparison of Canon T7i and Canon T7.
Now lets look at the top view comparison of Canon T7i and Canon T7.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon T7 is 57g lighter than the Canon T7i 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 T7i and Canon T7 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.
Unfortunately neither Canon EOS Rebel T7i / EOS 800D / Kiss X9i nor Canon EOS Rebel T7 (EOS 2000D) 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 T7i and Canon T7's LCD screens has the same diagonal size of 3".
On the other hand, Canon T7i sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. Canon T7's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to T7i.