The chart is available on both paper and alternatively on the very tough, almost un-tearable white bank note material, polypropylene, particularly suitable for charts that get moved around a lot or are displayed in unprotected public areas.
For normal use, I’d select the cheaper print on a double thickness paper, about 150gsm which is about twice the thickness of standard A4 or Letter paper.
If you are considering laminating the chart, I’d suggest buying the polypropylene bank note material instead as it does not need protection.
A word about sizes. They are listed as ‘Medium’ ‘Large’ and ‘Huge’ for good reason. Even the medium is quite big as we need room to fit all that information.
Medium A1 is 841 x 594 (33.1 inches x 23.4 inches)
Large B1 is 1000 x 707 (39.4 inches x 27.8 inches)
Huge AO is 1189 x 841 (46.8 inches x 33.1 inches) commonly used in architectural blue prints
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