There are two issues here


1. The font spacing - that isn't going to be possible.
2. The issue of printing.

Let is start by saying that Word will only print what the printer driver will allow so as a general rule, custom page sizes are out. Use a standard paper size and make up the difference with the margins (see below)

Insert the images(s) in line and set the alignment to Centred.

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com