[USMA:26711] paper weight

[Matthew Zotter]

2003 AUG 27 WED   I’ve noticed that paper weight is given in LB, e.g. 20 pound paper; but the metric version is in “g/m^2”.  These seem to be in different dimensions, but “pounds” probably means “pounds-mass per inch square”.  Does any one know what paper weight really measures?  Thank you for your time.   Sincerely, Matthew Zotter