ENVELOPE SIZE GUIDE - Understanding North American Envelopes
Envelopes come in so many styles and formats, that it would be difficult to attempt to list them all. Add to that an endless variety of paper stocks, finishes, thicknesses and levels of durability. Some come with protective padding, security features and windows while others are designed for specific methods of shipping, like airmail envelopes.
Why not DOWNLOAD & PRINT our handy envelope size guide?
North American Envelope Types
#10 WINDOW ENVELOPES
Explore our versatile collection of window envelopes designed for all your mailing needs. Whether you need All-Purpose Window Envelopes for general correspondence, US Standard Window Envelopes for invoices and official letters, or IMB Window Envelopes for optimized postal tracking, we have the perfect solution. Ideal for businesses, billing, direct mail, and legal documents, our high-quality envelopes enhance efficiency, professionalism, and brand presentation. Choose the right window envelope to streamline your mailing process while ensuring accuracy and security.
Booklet Envelopes
Booklet envelopes are used every day for secure and efficient mailing. Ideal for reports, brochures, contracts, and marketing materials, they provide extra durability to protect important documents. Available in sizes 4 1/2" x 6 1/2" to 9 1/2" x 13", these envelopes ensure a professional presentation and safe delivery.
Baronial Envelopes
Also known as Euro Flap envelopes, these feature a deep triangular flap with a smooth, curved tip for a luxurious and elegant look. Designed in a neat square shape, they are perfect for wedding invitations, greeting cards, business announcements, and upscale correspondence, adding a sophisticated touch to any mailing.
Announcement envelopes
Our Announcement Envelopes boast a sophisticated design crafted to elevate the presentation of your contents. Available in a variety of sizes, they offer the perfect blend of style and functionality, ensuring a lasting impression from the moment they are received. Featuring a deep flap for a distinctive look, these envelopes are ideal for invitations, greeting cards, business announcements, and special events, adding elegance and professionalism to any mailing.
String & BUTTON envelopes
String and Button Envelopes are classic stationery essentials featuring a secure closure system with a string threaded through a washer. This timeless and reusable design provides a tactile and professional way to safeguard documents. Ideal for storing paperwork, organizing office materials, mailing important documents, and interoffice correspondence, these envelopes offer both functionality and vintage appeal.
CATALOG ENVELOPES
A catalog envelope is a Pocket Envelope features the flap on the short edge, providing a secure yet convenient way to insert and remove contents. Designed for easy access and added protection, these envelopes are perfect for storing documents, mailing important paperwork, organizing office materials, and securing confidential files.
Why not DOWNLOAD & PRINT our handy envelope size guide?
Head to our Shop by Size page to see the envelopes available.
Frequently Asked Questions
What are the standard envelope sizes in the US?
Standard US envelope sizes vary to accommodate diverse mailing needs. Key dimensions include the versatile #10 envelope (4 1/8" x 9 1/2") for business correspondence, the popular A7 (5 1/4" x 7 1/4") for invitations, A2 (4 3/8" x 5 3/4") often used for greeting cards, and larger formats like 6" x 9" or 9" x 12" for document mailers. For precise selection, we recommend using our printable envelope size chart to help you choose the right fit for your contents.
How do I choose the right envelope for my mailing needs?
Choosing the right envelope depends on your contents, the occasion, and the impression you wish to make. For instance, business envelope types like the #10 are ideal for invoices, while square and A-style envelopes are perfect for elegant event invitations. To easily match the ideal size and format with your specific purpose, refer to our comprehensive envelope types guide.
What types of envelopes are available for business use?
For businesses, a wide array of business envelope types are available to serve various professional mailing solutions. Common options include #10 regular and window envelopes for everyday correspondence, along with versatile booklet envelopes and catalog envelopes for marketing materials, and security-tinted options for confidential documents. These provide professional mailing solutions for invoices, statements, contracts, and promotional materials.
Are there envelope types best suited for invitations and events?
Yes. For invitations and events, specific envelope types guide you towards the most elegant choices. A-style and baronial envelopes, such as A2, A6, A7, and square envelopes, are commonly favored for wedding invitations, RSVP cards, and announcements. Their elegant shapes, luxurious textures, and high-quality finishes make them ideal for formal, creative, and memorable event uses.
Why is understanding envelope dimensions important for mailing?
Understanding mailer dimensions is crucial for several reasons. It helps ensure compliance with postal regulations, provides optimal document protection for your contents, and allows you to avoid unnecessary postage costs. Oversized or non-standard shapes may indeed incur additional fees. Our envelope usage guide simplifies this process, making it easy to select the correct size for any application, ultimately providing professional mailing solutions.
Can I get a printable envelope size chart?
Absolutely. We understand the need for quick reference, which is why you can download and print our handy envelope size guide directly from this page. It serves as a comprehensive printable envelope size chart, a helpful reference for comparing various envelope dimensions, flap types, and compatible insert sizes, all conveniently presented in one visual tool.
Are your envelopes customizable for branding or events?
Yes, we offer customizable envelopes designed to enhance both your business branding and special events. You can add your logos, specific colors, personalized messaging, or specialty finishes to align perfectly with your brand identity or to create truly memorable invitations for weddings, product launches, and other significant occasions. This is part of our commitment to providing tailored professional mailing solutions.
What makes your envelope collection different?
Our envelope collection stands out through its vast variety of standard envelope sizes, premium paper stocks, vibrant colors, and extensive customizable envelope options. Whether you're mailing critical documents or designing exquisite invitations, we offer superior professional mailing solutions that consistently meet stringent quality, presentation, and sustainability standards, ensuring every piece of mail makes the best impression.
Anatomy of an Envelope
