Originally Posted By: Roger
Originally Posted By: wfaulk
Unlike A4 paper (and the rest of the A?/B? series)


Yep: "In a similar manner to the A series; the lengths of the B series still have the ratio 1 : root-2, and folding one in half gives the next in the series."

FWIW, that wasn't intended to be a question. Maybe "A*/B*" would have been a better appellation.
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Bitt Faulk