Size of supraspinatus tendon

I've been diagnosed with a supraspinatus tendon rupture of about 1.1 x 1.2 mm on the supraspinatus tendon (posterior fibers). Roughly, how big is it in relationship with its global size? Half? 2 thirds? I'm a small guy - 1.6m tall.

Also, does the tendon recover?

I notice my arm is still a little bit anterior rotated and down a bit as well. About a year has passed.

Should I be worried with some kind of arthrosis down the line, because of the position of the humerus on the glenoid cavity?