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Q: Most Common Envelope Window Margins ( Answered 5 out of 5 stars,   3 Comments )
Subject: Most Common Envelope Window Margins
Category: Business and Money > Accounting
Asked by: tony8312-ga
List Price: $24.00
Posted: 28 Mar 2006 09:27 PST
Expires: 27 Apr 2006 10:27 PDT
Question ID: 712795
I don't know where or how to find this out... Hence why I'm coming here...

I have a software that I'm building to print out a document. These
documents may be mailed to recipients, in fact this is quite common,
so I have the idea of automatically labeling a sheet of paper with the
addresses so that a business envelope may be used.

To my disappointment, I found out that there are many different sizes
of windo envelopes available. I'd like to find the most common
margin/dimesion set(s). Is there a site that lists such statistics?

How far from the top/left (from address) is the first window?
How tall is it? (Width is not a requirement)
How far from the top/left (to address) is the window?

My only other options to use this feature are to sell envlopes out of
my office that my application is designed to fit or to rquire the user
to measure their envlope.
Subject: Re: Most Common Envelope Window Margins
Answered By: hummer-ga on 28 Mar 2006 11:28 PST
Rated:5 out of 5 stars
Hi tony8312,

If you plan on a window being 5/8" from the bottom, and 7/8" from the
left and  the size 1-1/8" x 4-1/2", you should catch most addresses.
Remember that the address itself must have at least a 1/8" space on
all sides between it and the edge of the window.

California State University
"Normal window placement is " from the bottom and 7/8" from the left.
Window size is 1 1/8" x 4 1/2"."

Single-Window Envelopes
Theoretically, nearly each envelope type and size may have a window,
this generally depends on the manufacturer. The most common (and
recommended by USPS) window size is 1 1/8 x 4 1/2, and the position
7/8 in from left and 1/2 (often 5/8) in from bottom, but there are
lots of variations.
[see graphic]
Addressing and Printing Guidelines
The correct formatting and address position on an envelope is required
to facilitate mail processing by optical character recognition
equipment, used by many postal services for sorting mail.
Machine-readable mail can be sorted automatically, rather than by a
human, which results in faster and more accurate delivery.
Here is the picture that illustrates the correct address position:
[see graphic]

600 Basic Standards for All Mailing Services
601 Mailability
6.3 Window Envelope
For all letter-size and flat-size mail in window envelopes, every
character in the delivery address, including any postal barcode,
marking, or endorsement, must be completely visible through the window
throughout the full range of movement of the insert bearing the
delivery address. Any window envelope used for letter-size or
flat-size mail claimed at automation rates or for letter-size mail
claimed at Enhanced Carrier Route high density or saturation rates
must also meet the barcoding standards for letters and flats in
708.4.0. Any window envelope used for letter-size or flat-size mail
claimed at any other rate must meet the following additional
a. The address and any barcode visible through the window must be
printed on white paper or paper of a very light color.
b. A clear space of at least 1/8 inch is required between the address
block, which includes any optional endorsement line and any barcode,
and the top, bottom, and left and right edges of the address window,
and must remain when the insert is moved to its full limits in each
direction within the envelope to ensure efficient processing and
delivery. For nonautomation rate mail, the bottom edge of the address
window must not extend more than 1/8 inch into the barcode clear zone
as defined in 202.5.1. Any letter-size envelope containing a window
that intrudes into the barcode clear zone is not eligible for MLOCR or
RVE FASTforward processing options for the Move Update standard in

202 Elements on the Face of a Mailpiece
2.1 Address Placement Causing Mail to be Nonmailable and Nonmachinable
The location of the delivery address on a letter-size mailpiece
determines which dimensions are the length and height of the piece.
The length is the dimension parallel to the address as read; the
height is the dimension perpendicular to the length. Consequently, the
placement of the address may render a piece nonmailable or
nonmachinable. On a letter-size piece, the recommended address
placement is within the optical character reader (OCR) read area,
which is a space on the address side of the mailpiece defined by these
boundaries (see Exhibit 2.1, OCR Read Area):
a. Left: 1/2 inch from the left edge of the piece.
b. Right: 1/2 inch from the right edge of the piece.
c. Top: 2-3/4 inches from the bottom edge of the piece.
d. Bottom: 5/8 inch from the bottom edge of the piece.
{see graphic]
Exhibit 2.1 OCR Read Area
d. If a window envelope is used, the clearance between the leftmost
and rightmost bars and any printing or window edge must be at least
1/8 inch, and the clearance between the barcode and the top and bottom
window edges must be at least 1/25 inch. These clearances must be
maintained during the insert's range of movement in the envelope.
Address block windows on heavy letter mail (as defined in 5.2, General
Barcode Placement for Letters) must be covered; such windows may be
covered on other mail. Covers for address block windows are subject to

I was glad to find this for you. If you have any questions, please
post a clarification request and wait for me to respond before
closing/rating my answer.

Thank you,

Google Search Terms Used: envelope window placement usps standards
tony8312-ga rated this answer:5 out of 5 stars and gave an additional tip of: $5.00
I'm amazed by the answer. it was the most helpful answer I've gotten
and will help me a lot.

Thanks a lot...

Subject: Re: Most Common Envelope Window Margins
From: hummer-ga on 29 Mar 2006 11:48 PST
Dear tony8312,

Thanks so much for your nice note, rating, and tip!  I found the
research quite interesting and even dug into my recycling box to find
envelopes with windows so I could measure and take my own little
survey. It's something one doesn't really think about unless asked.  I
was amazed to see such a variety of windows in just my pile of
envelopes, but when I actually measured them, most came pretty close
to the USPS standards.

Good luck with your project!
Subject: Re: Most Common Envelope Window Margins
From: tony8312-ga on 16 Aug 2006 20:46 PDT
I hope you get emails regarding when a comment is posted hummer-ga. I
just wanted to let you know that your help has withstood the test of
time for a few different envelope sizes. I still very much appreciate
the depth of this answer.
Subject: Re: Most Common Envelope Window Margins
From: hummer-ga on 17 Aug 2006 06:45 PDT
Dear tony8312,

It's nice to hear from you! I have thought of you too since we last
wrote, particularly when I receive an envelope with a weird window - I
always feel compelled to get out my ruler (see what you've done to my
poor brain!).

Yes, it would be nice if the email notification feature would work but
alas, GA hasn't been able to fix it yet. Hope you get this!

Take care,

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