The numbers on the wall chart.
Sheet sizes, paper weights, and fold schemes - the trade figures every estimate leans on, in one place. The estimator uses the same conventions.
Table
US and ISO sheet sizes
Letter to 28 x 40, A6 to A0 and SRA3, in inches and millimeters, with what each size is used for.
TablePaper weight conversions
Bond, text, cover, and board: US pound weights against gsm and pt caliper, with typical uses.
TableFold schemes
Half fold to roll fold: panel counts, how each fold behaves, and why nested panels run narrower.