$xrandr
 SZ:    Pixels          Physical       Refresh
*0   1600 x 1200   ( 363mm x 272mm )  *60
 1   1600 x 1024   ( 363mm x 272mm )   63
 2   1600 x 1000   ( 363mm x 272mm )   63
 3   1400 x 1050   ( 363mm x 272mm )   73
 4   1280 x 1024   ( 363mm x 272mm )   75
 5   1440 x 900    ( 363mm x 272mm )   73
 6   1280 x 960    ( 363mm x 272mm )   73
 7   1280 x 800    ( 363mm x 272mm )   73
 8   1152 x 864    ( 363mm x 272mm )   75
 9   1280 x 768    ( 363mm x 272mm )   73
 10  1024 x 768    ( 363mm x 272mm )   75
 11   800 x 600    ( 363mm x 272mm )   75
 12   768 x 576    ( 363mm x 272mm )   73
 13   640 x 480    ( 363mm x 272mm )   75