First Class Envelope with Single, Center Window – 9-1/2″ x 11-1/2″

Large First Class Mail Envelopes, “Important Information Enclosed” with One Center Window.

This single-window envelope makes it easy to mail large documents, tax returns and organizers with an address cover sheet printed from tax software, or create your own. It is printed with the text “Important Information Enclosed”.

Get big discounts on larger quantities! 

With a 9-1/2″ x 11-1/2″ size, the envelope easily stores large documents or tax returns with many pages. It has a cellophane window for security and a moisture seal flap.

Tax Software Compatibility: Lacerte™

Minimum 50 / Multiples of 50.

Qty 50 - 99$0.52 ea
Qty 100 - 249$0.45 ea
Qty 250 - 499$0.40 ea
Qty 500 - 999$0.36 ea
Qty 1,000 - 1,999$0.33 ea
Qty 2,000 - 20,000$0.31 ea

Product Details

Large First Class Mail Envelope with Single Window and Green Border, Printed with “Important Information Enclosed”

Large 1st Class Mail Envelopes are In Stock and Ready to Ship! This official first class mail envelope has a single window near the center to display the delivery address using a slipsheet printed from Lacerte™ tax software, or create your own coversheet.

It is in a portrait layout and has green ‘first class mail’ triangle icons printed along the edges and FIRST CLASS MAIL printed under the window, with Important Information Enclosed printed near the bottom.

Get big discounts on larger quantities!

Style: Portrait
Seal Type: Moisture Seal
Size: 9-1/2″ x 11-1/2″
Paper Weight: 28#
Flap Opening: Short End
Ink Color: Green
Text: First Class Mail / Important Information Enclosed

Window Size: 1-3/4″ x 3-3/4″
Window From Left Side: 3″
Window From Bottom: 6-3/4″

Tax Software Compatibility: Lacerte™


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