I'm posting this one a second time as I didn't get a satisfactory answer the first time.

I want to plot marks on a sheet of paper according to their x & y coordinates, and the printer scale must be 1:1, i.e. if the coordinates are for example (53,67) relative to the origin, then I want to actually measure 53 and 67 mm with a ruler. The origin is to be set at approximately the center of the sheet (don't care if the margins are not quite symmetric)

I've used the printer.width and printer.height properties. For my current printer settings (paper size, orientation & whatnot) I'm getting 11904 nd 16834 respectively. How can I convert these numbers into mm?

Merry Christmas to you all!