Paper formats
Letter vs Legal: check the longer edge
Avoid trimming a Legal document when printing on Letter.
By Printer Paper Size Team•

US Letter measures 8.5 × 11 inches. US Legal measures 8.5 × 14 inches. They share a width, but Legal is three inches longer.
When the paper does not match
Printing a Legal document at original size on Letter can clip the bottom of the page. Scaling can fit it onto the shorter sheet, but makes the content smaller. A paper tray may also need to be adjusted to accept Legal sheets.
Check the document properties and printer settings rather than relying on the file name. Compare Letter and Legal in the reference.