the Elliptical Marquee tool and make a circular selection around the face.(Hold
down the shift key and drag around the face. To reposition the selection
while making, hold down the space bar and drag.)
3) Once your
selection has been made, from the main menu, choose Select>Feather , this
will bring up the Feather Selection dialog box. Input a value of 16 pixel
to be feathered, then click OK.