USPS-Specific Instructions on Constructing Your Address Block

For items sent to the USA:
Letter size paper (8 1/2″x11″):
Effective size for recipient’s postal address:
Due to use of a #10 envelope (9 1/2″ x 4 1/8″), letter size paper tri-folded (8 1/2″ x 3 5/8″) and the
USPS Multi Line Optical Character Recognition systems, the effective area on the letter page which
insures that all address parts will be visible through the envelope window is 2 6/8″ wide and 1 5/8″
tall.
Location of the effective address size on a Letter size paper:
Download a Microsoft Office Word template showing the effective address area
Selecting a font, style and size for the address block:
 Punctuation should be omitted, although period [.], slashes [/] and hyphens [-] are acceptable
 Sans-serif font preferred (Common sans serif fonts on Windows, Mac and Unix systems – October
2007)
 Capitalization preferred, especially with fonts size 10 and smaller
 No fonts with bold, extended, condensed, italic, highly stylized, or script-like attributes are allowed
 No “Flat-Top” characters (where numbers 3, 6 and 9 may be misread)
 Supported font size is 8-18 (A point is a printing unit equal to about 1/72 inch). Recommended: 10-
12; minimum of 2 points between lines

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