I assume this is a reproduction (since it is in excellent condition) of the original 1966 Ford GT40 Car Brochure. It has never been folded, but there are line indentations where it should be folded.  Total unfolded dimensions are 14" x 23" and when folded will end up being a multi-page brochure that is 7" x 11.5".  It will be shipped like a poster in a tube.