Units of paper quantity the 500-sheet ream has become the de facto international standard. A paper bundle is a quantity of sheets of paper, currently standardized as 1,000 sheets. A bundle consists of 2 reams or 40 quires. As an old UK and US measure, it was previously equal to 960 sheets. When referring to chipboard, there are two standards in the US. In general, a package of approximately 50 pounds of chipboard is called a bundle. Thus, a bundle of 22 point chipboard (0.022" thick) 24" × 38", with each sheet weighing 0.556 pounds, contains 90 sheets. However, chipboard sold in size 11"
First Folio texts were beyond the typesetters' capacity to correct. The Folio was typeset and bound in "sixes" – 3 sheets of paper, taken together, were folded into a booklet-like quire or gathering of 6 leaves, 12 pages. Once printed, the "sixes" were assembled and bound together to make the book. The sheets were printed in 2-page formes, meaning that pages 1 and 12 of the first quire were printed simultaneously on one side of one sheet of paper (which became the "outer" side); then pages 2 and 11 were printed on the other side of the same sheet (the "inner" side).