Letter (paper size) "official" "Government Letter" size, , was used in government, while paper was standard in most other offices. In the U.S., paper density is usually measured in "pounds per ream" (of 500 sheets). Typical Letter paper has a basis weight of paper of – the weight of 500 sheets (a ream) of paper at and at 50% humidity. One ream of 20-pound Letter-sized paper weighs , and a single Letter-sized sheet of 20-pound paper weighs , which is equivalent to 75.19 g/m. Some metric information is typically included on American ream packaging. For example, 20-pound paper is also labeled as 75
Page (paper) Page (paper) A page is one side of a leaf (or sheet) of paper, parchment or other material (or electronic media) in a book, magazine, newspaper, or other collection of sheets, on which text or illustrations can be printed, written or drawn, to create documents. It can be used as a measure of communicating general quantity of information ("That topic covers twelve pages") or more specific quantity ("there are 535 words in a standard page in standard font type") The word "page" comes from the Latin term "pagina", which means a "a written page, leaf, sheet" which in turn comes