Large-print (also large-type or large-font) refers to the formatting of a book or other text document in which the font size is considerably larger than usual to accommodate people who have low vision. Frequently the medium is also increased in size to accommodate the larger text. Special-needs libraries and many public libraries will stock large-print versions of books, along with versions written in Braille.

The font size for large print is typically at least 18 points in size, equivalent to 24px for a web CSS font size. Different sizes are made to suit different visual needs, with a common rule of thumb to be at least twice the minimum acuity size.

The American National Association for Visually Handicapped (NAVH) provides the NAVH Seal of Approval to commercial publishers in the US, for books that meet their large print standards. (Lighthouse International acquired NAVH in 2010.)

The standards call for:

The American Printing House for the Blind defines font sizes as:

In addition to enlarging type size, page layout and font characteristics can have a positive effect on readability. Fonts designed for legibility make it easier to distinguish one character from another. Some key characteristics of such fonts are:

Examples of more-easily read fonts are Antique Olive, Tahoma, Tiresias, and Verdana.

Companies offering the large-print formatting uses diverse formats (also called ratios) to support the larger font size. Among these ratios, we find: