Product Details

Product Details

Protect your mail in style with our 9 x 12 Open End First Class Envelopes, crafted from durable White Tyvek 14lb. These envelopes offer the best of both worlds—lightweight flexibility and tear-resistant toughness. Made from premium Tyvek material, they resist moisture, punctures, and everyday damage, making them perfect for securely transporting high-value or sensitive documents. With their classic 9 x 12-inch size and open-end design, they’re easy to load and ideal for large papers, contracts, or forms. Whether used in the office or at home, these envelopes meet first-class mailing standards with grace and reliability. Choose Envelopes for peace of mind and a polished professional finish every time.

  • Height: 12 inches
  • Width: 9 inches
  • Finish: Smooth
  • Material: Paper
  • Paper weight: 14
  • Closure: Gum
  • Flap: Straight Flap
  • Envelope size: 9 x 12
  • Envelope seam: Center
  • Envelope opening: Open End
Turnaround Time

Processing time 

  • Standard Plain Processing Time

    1 - 2 Days

  • Custom Print Order Processing

    5 - 7 Days

Shipping/transit time is based on the shipping method selected at checkout and begins once the order has completed processing and ships. Visit our shipping policy page for more information.

Return Policy

Returns, exchanges or refunds are accepted when received back within 30 days of purchase. 

Please note that custom-made products are uniquely tailored to your specifications, and as such, we are unable to accept returns for these items.

Visit our Returns page for more information on how initiate a return.

Customize Your Order

Whether you want to promote your brand or personalize an invitation, custom printing is available for most products.

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FAQs

Where can I learn about custom orders and sample availability?

For custom orders, please fill out our free quote request form.

View our Samples FAQ

How can I better understand stationery sizes and types?

To help navigate your stationery options (and our recommendations), check out our comprehensive guides on paper weights and envelope sizes, including free, downloadable templates compatible with Microsoft Word.

Visit the Size Guide

How can I reorder items?

Reordering is a breeze! Simply sign in to your account and click the "Reorder" button.

Can I change or cancel my order?

If you are looking to change or cancel your order before processing, please reach out to us and we would be happy to help you.

Once your order has been processed for shipping—or has already shipped—it cannot be canceled. You may refuse the delivery, and the order will be subject to our return policy.

Reseller program payment authorization help

If there’s a reseller program credit card authorization issue, your order will be placed on hold, and our team will contact you immediately to resolve the problem so your envelopes can ship as quickly
as possible.