Background: Facial implants have emerged as pivotal tools for both reconstructive and aesthetic skull bone augmentation. Con- temporary manufacturing techniques, such as computer-aided de- sign and manufacturing (CAD-CAM) systems, have revolutionized facial implants production, providing the advantages of high-level individualization. However, the absence of standardized facial mea- surements complicates the ability to accurately compare outcomes across various techniques. This systematic review investigates the strengths and limitations of various facial measurements employed