Making Grafts Finer for Eyebrow Transplantation

is it possible to transplant finer, smaller or thinner eyebrow hair follicles in areas surrounding or outside the edges of the thicker darker hairs of the eyebrow?

You can decrease the diameter of the hair follicle (make it finer) by damaging it in a controlled manner during the transplant procedure. This may reduce the survival of some of the hairs, but the procedure works well only in very experienced hands.