I want to reduce my brow bone and need to know cost for surgery and days fully needed to recover?

This requires a plastic surgeon to give you the opinion you want. This is highly specialized surgery with considerable risks involved. 

Orbital Bony Contouring with reduction of the excess bone under the brows is a procedure that we describe many years ago. Depending on the severity of the problem cost will be $5,000-7,000 including the surgeon's fee, anesthesia charges and operation room costs. You will need approximately 7-10 days for recovery.