Get free shipping
Printed stock promotion!

Spend $200+ to get free shipping. Use Code at Checkout

* More info
Back to all Articles

What Is a Clasp Envelope?

In today's world, envelopes come in various shapes and sizes. However, one type of envelope that stands out is the clasp envelope.

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.


Clasp envelopes 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. 


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.

Click here to buy the best clasp envelopes


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.

Click here for more information on mailing clasp envelopes


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.


Advantages of Using Clasp Envelopes

One of the primary advantages of using a clasp envelope is their 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.


Common Sizes of Clasp Envelopes

Clasp envelopes come in various sizes to suit different needs. Some of the most common sizes include:


6x9: This is a standard size for clasp envelopes and is ideal for mailing letters or smaller documents.


9x12: This size is larger and is 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 is excellent for sending larger documents or items that require a little more space.


10x13: This is the largest standard size for clasp envelopes and is ideal for mailing larger items or multiple documents.


10 x 15: This size is perfect for sending larger items or documents that need a little extra space to fit comfortably.

Click here for more information on clasp envelope sizes


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.


FAQs about Clasp Envelopes

Q: Are clasp envelopes recyclable?

A: Yes, most clasp envelopes are recyclable. However, it is important to remove the metal clasp before recycling.


Q: Can clasp envelopes be reused?

A: Yes, clasp envelopes can be reused if they are still in good condition. Remove the contents and replace them with new ones.


Q: How do I choose the right size clasp envelope?

A: When choosing a clasp envelope, it is important to consider the size of the contents you will be mailing or storing. Make sure to select an envelope that is large enough to hold your items without being too loose.



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 a clasp envelope.

Visit to shop for clasp envelopes.