Understanding Standard Paper Sizes in the United States
https://wiki-fusion.win/index.php/Understanding_Standard_Paper_Sizes_in_the_United_States
In the United States, we use Letter (8.5 x 11 inches), Legal (8.5 x 14), and Tabloid (11 x 17) as standard paper sizes, which differ from the A-series used elsewhere. Letter is for documents and printing, Legal for contracts, and Tabloid for posters or diagrams. Knowing which size to pick for a project saves paper and ensures compatibility with printers and binders.