CSS snippet to format a printed visualforce page as ANSI letter

din-5008-letter.css

/** DIN 5008 (Type A) with margins and paddings */
@page {
    size: A4 portrait;
    margin: 27mm 0mm 32mm 0mm; /** These margins control size of header and footer */
    padding: 5mm 0mm; /** Paddings for content page area to header/footer */
}

us-ansi-letter.css

/** ANSI Letter without individual margins */
@page {
    size: letter portrait;
}