Paper insert                 metal or custom insert
4x6:           $7.80                        $9.25            
5x7:           $12.80                      $14.25
6x8:           $15.80                     $17.25
7x9:           $20.80                    $22.25
8x10:         $25.80                    $27.25
9x12:         $33.80                    $35.25
10.5x13:   $44.80                   $46.25
12x15:       $52.80                    $54.25

*.10 cents per letter
*40 letters free w/4x6
*50 letters free w/5x7