I am working for 4 companies, and thus I have to use 4 different letterheads.
I made a set of 4 macros, that each add header+footer to my documents.

I am struggling to get the header and footer in the exact size as in the original letterheads (I have them in print, only, thus I am using a rule to measure their sizes).
Due to the char limit (250) I am forced to add header/footers as images (1 image for the header + 1 image for the footer).

How do I convert the image size from cm to point, so that I can add this setting in the VB code? I did some research online but it's very confusing.

For now, I have been using the "record macro" function so that I manually adjust the size of the header/footer image inserting the measuring in cm from the properties tab (page layout > page setting > customize header > add image > set image properties) but it never get it exactly as I want (not down to the mm) as:
1) there is always some space around my image
2) there is some resizing from the printer
3) I want to set a customized header/footer margin, too

Why can't I use cm in the VB code?
Or is there a workaround on the char limit, so that I can actually type the header/footer instead of using images?