Why are you getting worked up over an ebay listing that is most likely a typo?
Michelin offers that tire in a variety of widths, including 35, 38 and 40mm. The ebay listing is mixing two tires, and either the title or the details are wrong.
FWIW the so-called ISO width is simply matter of nomenclature, ie. a 700x 38c tire would be the same as an ISO (ERTRO) 38-622. So the nominal ISO width which is molded into the tire will match the width that might appear on a label. However, there will be variance between nominal width and actual width for a variety of reasons, one being the rim' actual width.
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