Quick answer: A clasp envelope is a heavy-duty paper envelope, usually brown kraft, with a metal butterfly clasp at the top of the flap that allows the envelope to be opened and resealed multiple times. The clasp holds the flap securely without adhesive. Clasp envelopes are the standard for interoffice document routing, filing, and flat-document mailing. They trigger a USPS non-machinable surcharge of $0.49 per piece when mailed through the postal system.
In today's world, envelopes come in various shapes and sizes. However, one type of envelope that stands out is the clasp envelopes.
What is a clasp envelope, you may ask?
A clasp envelope is a type of envelope that has a metal clasp closure at the top, which holds the envelope flap in place. This unique feature makes it ideal for securing important documents or files.
It have been around for a long time and have undergone significant changes over the years. In this article, we will explore the history of clasp envelopes, their uses, and why they remain an essential tool for many individuals and businesses.
What is a Clasp Envelope
A clasp envelope is a type of envelope that is made of heavy-duty paper or cardstock material. It is designed to hold and protect documents or other items during transit or storage. The envelope typically has a metal clasp at the top, which securely fastens the flap, ensuring that the contents inside remain safe and secure.
Clasp envelopes are commonly used for various purposes, such as sending important documents, storing valuable items, or mailing products. Therefore, they come in multiple sizes, ranging from small to large, to accommodate different things. Shop the full range at clasp envelopes.
History of Clasp Envelopes
The origins of the clasp envelope can be traced back to the mid-1800s. Before this, envelopes were typically sealed with wax or a similar substance. However, this method proved to be time-consuming and messy. So, in 1853, a man named Americus Callahan invented the first clasp envelope. The original design featured a string closure, which was later replaced with a metal clasp.
As the clasp envelope became more widespread, improvements were made to the design. In the early 1900s, manufacturers began adding reinforced edges to prevent tearing and improve durability. The metal clasps were also enhanced to make them easier to open and close.
How to Use Clasp Envelopes
Clasp envelopes are incredibly versatile and can be used for various purposes. Some common uses include:
- Filing: Clasp envelopes are perfect for storing and organizing important documents. The metal clasp ensures that the envelope's contents remain secure and in place.
- Mailing: Clasp envelopes are also commonly used for mailing items that need to be kept secure, such as contracts or legal documents. For full USPS mailing guidelines and rules for clasp envelopes, see Can You Mail Manila Envelopes With Clasps? Guidelines and Tips.
- Shipping: If you need to send a small item, a clasp envelope can be cost-effective. The reinforced edges and metal clasp provide extra protection during transit.
- Storage: Clasp envelopes are also helpful for storing small items like receipts or business cards.
When using a clasp envelope, it is important to ensure the contents are properly secured. The metal clasp should be tightly fastened to prevent the contents from falling out.
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"I need to put several personal documents together to get my Real Id. Just 1 of these made the paperwork fit and close tightly."
Lisa Zimmerman | Verified buyer, 9x12 Brown Catalog Envelopes With Metal Clasp Closure
Source: businessenvelopes.com product reviews
Advantages of Using Clasp Envelopes
One of the primary advantages of using a clasp envelope is its durability. The heavy paper stock and metal clasp make them more resistant to tearing and damage than regular envelopes. Additionally, the clasp provides a more secure closure, making it ideal for mailing important documents or items.
USPS Mailing Rules for Clasp Envelopes
The most important practical detail about clasp envelopes that many buyers discover only after placing their order: the exposed metal clasp triggers a USPS non-machinable surcharge.
For organizations mailing clasp envelopes at volume, this surcharge is significant. A run of 1,000 clasp envelopes costs $490 more in postage than the same run in a plain gum-seal or peel-and-seal catalog envelope of identical size. The clasp envelope holds the same documents the same way , the only difference is the postage cost.
Two options exist for reducing postage cost on clasp envelope mailing programs:
- Remove or tape the clasp flat: If the clasp is pressed flat against the envelope face and taped securely, the piece may qualify for standard automated processing. The USPS reserves the right to assess the surcharge regardless, so test with your local Post Office before running a full batch.
- Switch to a plain catalog envelope for outbound mail: Reserve clasp envelopes for internal routing, filing, and hand-delivery. Use a plain gum-seal or peel-and-seal catalog envelope of the same size for outbound postal programs. The documents are equally protected and postage is not affected by the clasp surcharge.
For the complete USPS guidelines on mailing clasp envelopes, including preparation steps and alternatives, see Can You Mail Manila Envelopes With Clasps? Guidelines and Tips.
Common Sizes of Clasp Envelopes
Clasp envelopes come in various sizes to suit different needs. Some of the most common sizes include:
- 6x9: The 6 x 9 clasp envelopes are a standard size for clasp envelopes and are ideal for mailing letters or smaller documents.
- 9x12: The 9 x 12 clasp envelopes are larger and are ideal for mailing larger documents or small items.
- 9 1/2 x 12 1/2: This size is slightly larger than the 9 x 12 envelope and 9 1/2 x 12 1/2 envelopes, which are excellent for sending larger documents or items that require a little more space.
- 10x13: The 10 x 13 clasp envelopes are the largest standard size for clasp envelopes and are ideal for mailing larger items or multiple documents.
- 10 x 15: The 10 x 15 clasp envelopes are perfect for sending larger items or documents that need a little extra space to fit comfortably.
For a complete size and dimensions guide with interior clearance measurements, see Clasp Envelopes: Complete Guide to Sizes, Uses, Mailing Rules and Closures. For a full comparison of all large envelope sizes, see Large Envelope Sizes: 9x12, 10x13, and More Explained.
| Size | Holds Flat | Best For |
|---|---|---|
| 6 x 9 | A4 and half-sheets | Small documents, receipts, photos, business cards |
| 9 x 12 | 8.5 x 11 flat | Contracts, certificates, reports, interoffice routing |
| 9.5 x 12.5 | 8.5 x 11 with extra clearance | Thick packets, multi-tab document sets |
| 10 x 13 | Legal-size 8.5 x 14 | Legal documents, presentation folders, manuscripts |
| 10 x 15 | Oversized flat materials | Blueprints, calendars, large certificates |
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"I teach classes that require a great number of printed submissions. I give out these envelopes on the first day with the students' names on them, and they submit their papers in them. When I return the graded papers, the grades and comments are inside, allowing the students privacy. Good price, fast delivery."
V. J. Andrews | Verified buyer, 9x12 Brown Catalog Envelopes With Metal Clasp Closure
Source: businessenvelopes.com product reviews
How to Address a Clasp Envelope
When addressing a clasp envelope, you should write the recipient's name and address on the front of the envelope. Also, include a return address in the upper left corner.
How to Store Clasp Envelopes
Clasp envelopes should be stored in a cool, dry place to prevent them from becoming damaged. You should also avoid storing them in an area with high humidity or direct sunlight, as this can cause the paper to weaken or fade.
Clasp Envelope vs. Regular Envelope
The main difference between a clasp envelope and a regular envelope is the presence of the metal clasp. While regular envelopes have a gummed flap that must be moistened to seal, clasp envelopes use a metal clasp to hold the flap closed. This makes them more secure and durable than regular envelopes.
| Factor | Clasp Envelope | Regular Gum-Flap Envelope |
|---|---|---|
| Closure method | Metal butterfly clasp (no adhesive) | Moistenable gum adhesive |
| Reusable | Yes , open and reseal many times | No , adhesive is single-use |
| Paper stock | 28 lb brown kraft | 24 lb white wove (standard) |
| Best for | Interoffice routing, filing, repeated access | Outbound postal mail, single-use correspondence |
| USPS postage | Flat rate + $0.49 non-machinable surcharge | Standard flat rate, no surcharge |
| Recyclable | Yes , remove metal clasp first | Yes , standard paper recycling |
Why Business Envelopes for Clasp Envelopes
Business Envelopes has supplied clasp envelopes to businesses, government agencies, educational institutions, and healthcare facilities across the United States since 1997. Every clasp envelope in the catalog is 28 lb brown kraft with a metal butterfly clasp and gummed seal, available in all standard sizes with no minimum order and free ground shipping to the contiguous 48 states.
- No minimums on any order
- Free ground shipping to the contiguous 48 states
- Blank stock ships same or next business day
- All standard sizes stocked: 6x9, 9x12, 9.5x12.5, 10x13, 10x15
See the full clasp envelope range at clasp envelopes and all envelope formats at all sizes envelopes.
Conclusion
In conclusion, a clasp envelope is a unique and useful tool for securing important documents or items. From its origins in the mid-1800s to its modern-day use in businesses and households, the clasp envelope has come a long way. With its various sizes and styles, the clasp envelope can be used for various purposes, including filing, mailing, shipping, and storage.
So, if you're looking for a reliable and secure way to store or mail your important documents, consider using clasp envelopes. Visit clasp envelopes at Business Envelopes to shop the full range with free ground shipping and no minimum order.