How to adjust the sizes of UI objects?

Question

Unity

Good afternoon. I have an object to which I need to create my own interface that displays labels and a couple of pictures. To do this, I add a Canvas to the object and give it World Space, then I change the size of the Canvas itself so that it fits the size of the object itself. The problem is that any UI objects in this Canvas are created very large, is there a way to fix this? The pictures show respectively the Canvas settings, the object (in this case a circle) and the Canvas adjusted to its size, the child image of the Canvas, which is many times larger than its size, as you can see.