Product Dimensions: Spacious and Expandable

The Expanding Envelope E3 is specifically designed to accommodate bulky paper loads that standard flat envelopes cannot handle. Its expandable sides allow the envelope to grow with your contents, making it ideal for files, reports, or bound documents.

• Width: 10 inches.

• Height: 13 inches

• Expansion Capacity (Gusset): Up to 3 inches

• Opening Style: Open-end (short side) or open-side, depending on design

• Style: Accordion-style expanding sides

This capacity allows users to securely store large files without folding or crowding, preserving document quality and accessibility.

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Material & Construction: Durable and Long-Lasting

Built for regular use, the E3 expanding envelope is made from high-strength kraft paper or reinforced fiber material. The sides expand like an accordion, offering flexibility and superior strength.

• Material: Heavy-duty kraft or red fiber paper

• Paper Weight: Often 120 gsm or more

• Color Options: Typically manila, red fiber, or brown kraft

• Finish: Slightly textured for easy labeling or printing

• Durability: Tear-resistant and pressure-tested for high-capacity use

Corner reinforcements and reinforced seams help prevent splitting or tearing under heavy use, making it a great long-term filing solution.

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Closure Mechanism: Secure and Reusable

Depending on the model, the E3 Expanding Envelope comes with one of several secure closure styles to protect contents.

• Closure Options:

  • String and Button: Reusable and classic for office filing

  • Velcro or Hook-and-Loop: Modern, clean, and easy to open/close

  • Elastic Band: Holds large content tightly and is highly flexible

Each closure style is design to withstand repeated use and ensures content remains safe and organized.

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Common Uses: Ideal for High-Volume Filing and Mailing

The Expanding Envelope E3 is widely use in industries where document volume and organization matter.

• Legal and Financial Offices: Safely store and transport case files or financial statements

• Education: Hold student records, report cards, portfolios, or class packets

• Healthcare: Store patient forms, records, or documentation packets

• Corporate Use: Manage multi-part proposals, reports, or training manuals

• Personal Use: Organize home records, tax returns, or warranty documents

Its size and flexibility make it indispensable for high-volume, high-value document handling.

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Environmentally Responsible Choice

• Recyclable Materials: Most models are made from recyclable paper

• Sustainable Options: Some envelopes use FSC-certified or post-consumer recycled content

• Reusable Closures: Reduces the need for frequent replacements

The envelope’s long life and eco-friendly composition contribute to sustainable document management practices.

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Conclusion: Dependable Storage with Room to Grow

The Expanding Envelope E3 offers the durability, security, and capacity required for managing thick or growing sets of documents. Its expandable gusset, strong construction, and secure closure make it an excellent choice for professionals and individuals alike. Whether you’re organizing files in an office or storing important paperwork at home, the E3 envelope ensures your documents stay safe, flat, and ready when you need them.