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″
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
 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

Send Letters
Securely + Reliably
Send letters securely and reliably from any business application. Use for invoices, quotes, and other important business communications. Enjoy special web-form to postal features and instant notifications.
Simple Process
Easy as 1-2-3
Experience the ease of our streamlined process - developed for efficiency! You submit your document by email or API. We automatically print, collate, insert, and stamp your letter. Your letter is delivered via standard postal service.
Pay As You Go
No Fuss. No Obligations.
Register for free with no obligations! Evaluate the service as long as you need. Once you are ready, set up our user-friendly pay-as-you option to use our service. No fuss. No on-going commitment. Just plain easy!