What are the different types of envelopes?

An envelope is a specialised item designed for packaging and protecting documents or letters.

00:36 08 June 2025

An envelope is a specialised item designed for packaging and protecting documents or letters. It is usually made of paper but can also be made from other materials such as plastic or cardboard.

The primary function of an envelope is to ensure the confidentiality of its contents. It protects letters from prying eyes and helps keep them intact during transport, serving as a means to exchange correspondence easily and quickly.

Envelopes can be used not only for letters but also for sending promotional materials, documents, invitations, and other important papers. Companies often use custom branded envelopes as part of their marketing strategy, emphasizing individuality and attention to detail.

Classification by Purpose

Envelopes are an integral part of everyday life, used for packaging and passing various materials. Depending on their purpose, envelopes can fall into several main categories. In this article, we will explore the main types of envelopes and their functions.

Mail Envelopes

Mail envelopes are designed for sending letters and correspondence. They come in various formats, the most common standards being A4 and C5. Mail envelopes often have a gummed surface for convenient sealing and are printed with the sender's and recipient's addresses.

Some mail envelopes may be made from special paper that protects the contents from moisture and mechanical damage. They also often feature a print that allows the sender to place a stamp.

Bank Envelopes

Bank envelopes are intended for transmitting cash, important financial documents, or notifications. These envelopes often have special security features, such as hidden seals or watermarks, to prevent unauthorised access to the contents.

Bank envelopes can be used to send checks, credit cards, debt notifications, and other documents related to financial transactions. Their reliability and security are essential traits, making them indispensable in the banking sector.

Envelopes for CD/DVD Discs and Records

Envelopes for CD and DVD discs are designed for their storage and handling. They are typically made from cardboard or plastic and have a special internal mechanism to hold the disc in place. These envelopes protect the discs from scratches, dust, and other damage, which is especially important for maintaining audio and video quality.

Envelopes for vinyl records also have their own features. They can be either standard or designed according to the album's artwork, making them appealing to collectors. These envelopes are often made from thick cardboard and have additional protective elements, such as inner liners.

Gift Envelopes

Gift envelopes are intended for packaging gifts, cash, or gift certificates. They have various formats, including non-standard ones, allowing us to select the best option for any holiday or event.

Gift envelopes can feature vibrant designs, patterns, and even personalised messages. Custom envelope printing is widely used for weddings, birthdays, anniversaries, and various other celebrations. Gift envelopes bring a touch of surprise and delight, highlighting the uniqueness of the gift.

Types of Envelopes by Size

Traditional sizes such as C4, C5, and DL hold a special place in office practice. The C4 envelope is designed to hold A4 documents without folds, making it ideal for sending resumes or important papers. The C5 envelope, on the other hand, is suitable for A5 documents and is often used for letters and postcards. The DL size (110×220 mm) is used for standard A4 sheets folded in half.

Mini envelopes, typically sized 70×100 mm, are perfect for invitations, greeting cards, or small gifts. Their compactness and bright designs make them particularly appealing for holidays and celebrations.

Large envelopes suitable for A3 documents are ideal for sending drawings, maps, or presentations. They ensure the security and integrity of the business correspondence.

How to Choose the Right Envelope for Different Purposes?

The right choice depends on the intended use of the envelope:

1. Business Correspondence. For sending official documents such as contracts or reports, C4 envelopes are the best choice. They accommodate A4 documents without folds, preserving their professional appearance. Envelopes with adhesive seals ensure secure closure and protect the contents.
2. Personal Letters. For personal correspondence, C5 or DL envelopes can be used. They are perfect for letters, postcards, or invitations. It is important to choose an envelope with an attractive design that reflects the sender's personality.
3. Promotional Materials. For mailing catalogues or brochures, large C3 envelopes are ideal. They provide enough space for multiple pages and protect the materials from damage. In this case, it is a good idea to focus on a bright design that will catch the recipient's attention.
4. Small Items or Gifts. Mini envelopes are suitable for cash gifts or small souvenirs. They are compact and easily fit into a mailbox, making them a practical choice for personal correspondence.

Tips for Choosing Material, Size, and Design

The type of material directly affects the strength and protective properties of the envelope. For sending documents, it is best to choose products made from thick paper or cardboard. If you are forwarding something fragile, consider envelopes with bubble wrap inside, for they provide extra protection.

The size should match the contents. Avoid using envelopes that are too large or too small, as this can lead to damaging the contents or awkward packaging. If you are sending standard A4 sheets, opt for C4 and C5 sizes. To enclose multiple pages, choose C3.

The design of the envelope plays a key role in the way the delivered information is perceived. For business correspondence, select reserved and professional colours, such as white or grey, while for personal letters and invitations, you can use brighter and more creative options. Don’t forget to add your company logo or personalised elements to make the envelope more memorable.