A manila envelope is the best friend when you have to send papers safely. It is robust and tidy, and it is the one that is trusted by the majority of the USA. From schools to offices, these envelopes keep your papers flat and tidy. They make mailing easy and professional. People like them, as they give a clean and smart appearance. They are not complicated and yet dependable; that is why they are still in use.
In this blog, we are discussing everything about them, from what a manila envelope is to how to address a manila envelope and even how many stamps for a manila envelope you may need. You will also learn about Manila envelope sizes, texture, and how to post them with care.
First impressions matter at Blackline Packaging. That is why our custom boxes and envelopes help businesses send their message with style. Let’s begin this simple and complete guide.
What is a Manila Envelope?
A manila envelope is a sturdy paper envelope that is used to secure documents. It is light brown or tan, and its texture is smooth and slightly rough, known as the manila envelope texture. The reason why these envelopes are popular is that they are durable and convenient to utilize. They have your papers flat and will not fold. They are used in residential places, schools and offices. They are reliable since they remain rigid even when posted over a long distance.
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Key Characteristics
They are constructed with tough kraft paper, which is not easily torn. They protect letters, legal papers, and photos. The smooth surface makes addressing a manila envelope simple with a pen or marker.
The paper texture adds grip, keeping the envelope easy to handle. The flap seals neatly to keep dust out. It is simple yet designed for daily use in offices and mailrooms.
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Brief History
The name “Manila” comes from Manila hemp, a fibre from the abaca plant grown in the Philippines. In the 1800s, this fibre became famous for making rope and paper. Soon, it was used for making durable envelopes.
Over time, factories began using recycled paper to replace hemp. This brought about low-cost production and sustainability. They are currently among the most environmentally friendly paper products in the world.
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Material: Kraft Paper
The current envelopes are primarily recycled papers. It is eco-friendly and can be recycled or reused. According to USA recycling statistics (2025), over 80 per cent of the packaging material manufactured out of kraft is recycled annually. This will reduce the number of trees that are cut, leading to the benefit of the planet. The thick paper also resists moisture, keeping your papers clean. The natural look of kraft makes the envelopes stylish and modern.
Types of Manila Envelopes – Closures and Features
There are many styles and closures that suit different needs. Our company makes all these with care and quality. Each style has a unique use depending on what you are sending. Some are good for one-time mailings, others for regular filing. Having options helps you stay organized.
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Open-Side vs. Open-End
Open-side envelopes open along the longer edge and are good for office documents. Open-end ones open on the short side and are used for filing or mailing thick papers. Open-side types are often used with printers and copiers. Open-end types are used in cabinets and drawers. Each style keeps papers neat and easy to find.
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Clasp Envelopes (Metal Brass Clasp)
These have a small metal fastener. You insert the flap, bend the clasp, and it locks tight. It can be reopened many times. They are perfect for internal office mail. The clasp gives a secure hold even with frequent use. It is ideal for reports, invoices, and letters. The metal part shines and adds a smart finish.
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String and Button Envelopes
This type closes with a string looped around two small circles. It looks neat and gives a classic feel. They are used when files need to be opened often. They are popular in creative studios and legal offices. The string keeps papers from slipping out. The closure style gives an old-fashioned charm.
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Peel and Seal Envelopes (Self-Sealing)
These have glue under a paper strip. Just peel and press, no licking or tape needed. They make mailing quick and clean. They are hygienic and save time for bulk mail. Many companies use them for client letters. The seal is firm and leaves no sticky marks.
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Expanding (Gusseted) Envelopes
These have folded sides that expand when filled. They are great for carrying thick booklets or stacks of papers. Many businesses prefer them for secure deliveries.
They protect contents from bending or tearing. These envelopes are also reusable for office files. Their flexible design makes them a top choice for couriers.
Standard Manila Envelope Sizes and Dimensions
The size of a manila envelope is known to select the appropriate one. The Manila envelopes of standard size are made so that they would not be folded to accommodate A4 or legal-size documents. Selecting the right size avoids damage, and postage is saved. The little ones are most suitable for carrying notes, and the big ones for carrying blueprints. You should never purchase without measuring what you are purchasing.
Manila envelopes are available in various sizes with the specific purpose and type of the document.
- The 6 x 9 inch (152 x 229 mm) envelope is a tiny Manila envelope normally used when mailing letters, invitations, checks, or photos without having to fold the envelope.
- The most common standard size envelope size that fits best in any office files, school papers and certificates that must remain flat is the 9 x 12 inch (229 x 305 mm) envelope.
- In the case of slightly bigger documents, a 10 x 13 inch (254 x 330 mm) envelope is more spacious and is ideal for brochures, thick reports, or several sheets of paper.
- Larger sizes, such as the 12 x 15.5 inch (305 x 394 mm) envelope, are intended to be used with catalogs and booklets, and the 14 x 18 inch (356 x 457 mm) envelope is intended to be used with legal-size documents or oversized documents that need to be kept unfolded and safe.
All the sizes offer safe and professional packaging, depending on the kind and amount of documents that you should store or send. They are perfect for the photos or receipts. Blackline Packaging’s Manila envelopes are available in online stores, or you can order personalized ones online. Our company offers flexible dimensions of a manila envelope, keeping your documents safe and stylish. Each piece is tested for durability before use. We ensure they hold their shape even after long storage. Your papers stay secure and clean inside.
Key Features and Specifications
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Paper Weight (Basis Weight)
Heavy paper gives strength for posting. Lighter paper is used for internal file storage.
Thicker paper prevents bending and adds a professional touch. Lighter stock is less expensive and also environmentally friendly. Select the appropriate weight on the basis of its frequency of use.
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Reinforcements
Corners and seams are reinforced so they do not rip. Many modern envelopes include an extra inner layer for added protection.
These reinforcements extend the life of the envelope. They also protect it during shipping and handling. It is one reason why businesses trust them for important mail.
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Security Features
For private papers, choose envelopes with tamper-evident seals. Some also have inside printing that hides what’s inside. In 2025, over 60% of business envelopes in the USA include privacy tints.
Some even have tear-proof strips for safe opening. Security printing stops curious eyes. It helps keep sensitive documents fully confidential.
Common and Specialized Use Cases
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Document Archiving & Storage
Manila envelopes are used to store old papers in companies since they are good and simple to label. The substance prevents dust and sunshine.
They can store files for years without damage. Many schools and offices use them in boxes or cabinets. The envelope’s natural tone gives a clean and tidy look.
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Mailing and Shipping
When people are mailing, they will tend to ask questions such as 'How many postage stamps do I have in a manila envelope?' or 'How many stamps in a manila envelope?' In the case of the USA, less than 100 g of weight will be sufficient to use one First Class stamp. Depending on the size and weight, heavier ones can require two or more. Always weigh your mail before posting to avoid returns. Use correct USPS manila envelope postage if sending abroad. Careful stamping ensures smooth delivery.
If unsure, check with Royal Mail’s 2025 online postage calculator. It gives exact rates based on the dimensions of the manila envelope and weight.
This saves time and keeps postage costs right. It’s also eco-friendly to plan deliveries together. Using correct postage reduces waste and re-mailing.
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Academic and Legal Applications
Schools use them to send certificates and test sheets. Law firms prefer them for contracts because they keep edges sharp.
They’re great for projects, exams, and reports. They add a formal, professional look. Using them makes paperwork easier to track.
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Creative And Presentation Uses
Artists use colored manila envelopes for handmade cards or drawings. Event planners use them for invitations or craft sets. They also suit gift packaging and branding kits. Designers love them for their vintage charm. Custom printing turns a plain envelope into art.
Our company designs stylish envelopes for every use, making your packaging look clean and modern. We blend function with creativity. Our designs help your brand stand out. That’s why customers return again and again.
How to Choose the Right Manila Envelope
The selection of the appropriate one is dependent on the nature of the mailing or storage. We have too many possible choices, and each one of them has the optimum application. Knowing your needs helps you pick the perfect one.
1. Contents Size and Bulk
Think about what will go inside. Thin letters need light paper; heavy documents need thick gusseted styles. Always leave space for air so the flap seals flat. Overfilled envelopes may burst open. Choosing the right size prevents that problem.
2. Frequency of Access
If you open it often, pick a clasp or string type. In case it is a mail that is one-time mail, use peel-and-seal. Envelopes that are frequently used are to be tough and reclosable. On the lighter side, there are occasional ones. The design should be matched with use.
3. Security Needs
For private mail, use tamper-proof or printed interiors. Business papers often need this added layer. Legal and financial files always need extra care. Using sealable envelopes helps protect client trust. Never compromize on document safety.
4. Shipping vs. Storage
For shipping, choose tough kraft manila envelopes. For storage, a light one will do fine. If you post worldwide, double-check weight limits. Storage envelopes do not require very strong seals. Where possible, always select environmentally friendly alternatives.
Blackline Packaging helps businesses pick the perfect style. Whether you post, present, or store, we make envelopes that fit your brand and keep your message safe. Our expert team understands business needs. Every order is checked for quality before dispatch. We make packaging simple and stress-free.
Properly Packing and Sealing a Manila Envelope
Mailing right is important to keep your post safe. Here’s how to do it the easy way. It can be done right without causing damage as well as postponement.
1. Step-by-Step Packing Guide
Place flat documents neatly. Remove air pockets so it closes flat. Do not overfill, it can tear in transit. Always align papers in one direction. Use a board for extra support. Seal after checking all items are inside.
2. How to Seal a Clasp Envelope
Fold the flap, bend the clasp tight, and tape over it if posting. This adds extra hold.
Taping keeps it closed during travel. Press edges gently to make it firm. The stronger the seal, the safer your post.
3. How to Seal a String-and-Button Envelope
Wrap the string around both buttons in an “8” shape until tight. It gives a classic look and keeps contents in place. Make sure the string is not loose. Tight wrapping avoids slips in transit. This closure looks neat and professional.
4. Mailing Tips
- Write addresses clearly.
- Use dark ink and block letters.
- In the top left, add your return address.
- Stamps go in the top right. That is how to compose an address on a manila envelope, and that is how to post a manila envelope.
- Always be sure to check postcodes.
- Write in a neat and readable way.
- The more understandable the speech, the quicker the speech delivery.
- In case you are wondering how to write on a Manila envelope, then always get the address of the receiver and write it in the middle.
- Make sure it’s not near the edges or seams.
- Using labels is also a smart choice. Printed labels look neat and resist smudges. It helps post offices scan them faster.
Our team ensures each envelope follows USA mailing standards so your items arrive safely and on time. We test our packaging against postal guidelines. Our focus is safety and customer satisfaction. You can trust our envelopes every time.
Conclusion
A Manila envelope is not merely a piece of paper; but it represents trust. It protects your work, letters, and memories. We explored every detail, from Manila envelope sizes and closures to USPS Manila envelope postage facts and mailing tips.
They help people keep order in busy lives. Their simplicity makes them timeless. No matter the era, they remain useful and reliable. They are still used in many British homes and offices today as a safe way to post. Their everlasting application demonstrates their importance. They are the mediators between individuals and companies.
Envelopes add a personal touch even in the case of email. This is why they will never lose their style. And in case you need a caring and quality envelope, then go to Blackline Packaging. Our custom boxes and mailer boxes make your brand look professional and polished. When you buy from us, you don’t just get packaging, you get confidence in every delivery. We believe every letter deserves care. Our products reflect your brand’s values. Trust us to make your packaging perfect every time.
Frequently Asked Questions
We've answered all the common questions you may have before ordering a custom box.
What are the standard sizes of manila envelopes?
The standard size used for manila envelopes is 9 x 12. It is perfect for letter documents.
What is the difference between a clasp envelope and a string tie envelope?
A clasp envelope has a metal clasp that gives secure and reusable sealing. And a string-tie envelope uses a circular button for opening and closing. Both offer reusable options, but the string tie envelope holds a professional look.
How much weight can a manila envelope hold?
A standard manila envelope holds up to 1–2 ounces of paper. And using thick papers, it can hold 4-6 ounces or more.
What size manila envelope do I need for legal size documents?
A 9.5 x 15-inch or 10 x 15-inch envelope fits legal documents flat without folding. And keeping the edges protected.
Are Manila envelopes recyclable?
Yes, the Manila envelopes are 100% recyclable. Because they are made from paper materials. Remove metal clasps or plastic windows before recycling.
What is a manila envelope made of?
Manila envelopes are made from Manila paper. This is strong and durable. Modern versions of the Manila envelopes use wood pulp.
Why are they called Manila envelopes?
The name “Manila” comes from Manila hemp. It is derived from the abacá plant. This was first exported from the Philippines. Early envelopes were made from this strong and flexible fiber.
What is the difference between a manila envelope and a kraft envelope?
The Manila envelope is light brown in color and is made from Manila paper. It has a smooth texture. A Kraft envelope is darker brown in color and is made from Kraft paper. It is stronger and rougher. Kraft envelopes are often used for heavy or industrial mailing, while manila envelopes are for office and document storage.
