Great page layout and graphic design! Peeking at the CSS, I notice that the main div is called "paper" and that the offset lengths are measured in centimeters a

Great page layout and graphic design! Peeking at the CSS, I notice that the main div is called "paper" and that the offset lengths are measured in centimeters and millimeters. I find that intriguing and unusual. Was the layout created with a WYSIWYG editor? Or is it due to the designer's preferences?