I vote something like this because your fabric is rectangular (so I eliminated the rectangular mirror) but the fabric pattern is not round or oval either. So...I like this one.. :) Round and oval! Oh...but of your three, I would pick the round one.

I like the round because it has a double circle, somewhat like your fabric. Would make sure the mirror is large enough to compliment the fabric which is beautiful.

Agreed with a larger round mirror.

I think an oval will be a better complement to the square shade and better occupy the space.