First Class Envelope with Single Center Window – 9-1/2″ x 12″

Large First Class Mail Envelopes with Center Window for Address Coversheet

This single-window 1st Class Mail envelope makes it easy to deliver large documents and tax returns with an address cover sheet. Print it from your tax software or create your own slipsheets.

Get big discounts on larger quantities! Select options to see pricing.

This 9-1/2″ x 12″ oversized envelope easily accommodates large documents or tax returns with many pages. It has a cellophane window for security.

Choose a moisture-seal or peel-and-seal flap.

Tax Software Compatibility: ATX™, CS UltraTax™

Minimum 50 / Multiples of 50.


Product Details

9-1/2″ x 12″ First Class Mail Envelope with One Center Window and Blue Border

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

It is in a portrait layout and has blue ‘first class mail’ triangle icons printed along the edges and FIRST CLASS MAIL printed near the bottom.

Style: Portrait
Seal Type: Moisture Seal or Self-Seal
Size: 9.5″ x 12″
Paper Weight: 28#
Flap Opening: Short End
Ink Color: Blue
Text: First Class Mail

Window: Single, Cellophane
Window Size: 2″ x 6″
Window From Left Side: 2″
Window From Bottom: 4-13/16″

Tax Software Compatibility: ATX™, CS UltraTax™

Moisture Seal Item# PEL38
Self-Adhesive Item# 80925


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