If you want to use VBA to set height and width in mm.
Ole Erlandson has code for setting row and column dimensions.
http://www.erlandsendata.no/english/index.php?d=envbawssetrowcol
Gord Dibben Excel MVP
>how do i change the columns dimensions to mm or cm?
>to work with some cad software i need to integrate spred sheets and the
>columns must be precise. for that at least the wide should be in mm or cm.
>thanks for your help