Business Envelopes - #10, Window, Security, Check and Self-Seal

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Order Business Envelopes and get FREE shipping! Standard size envelopes perfect for mailing letters, checks, invoices or marketing materials. Choose from a variety of styles and sizes to find the perfect envelope for any business communication need. Whether it's mailing a check or sending out a monthly catalog - we have a variety of business envelopes to get the job done. Suited for mailing invoices, statements, letters, marketing materials or other information. Choose from #10, Window, Security, Check, Self-Seal and Mailing business envelopes.

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If you need to send a check, invoice or simply mail a letter - we offer No 10 Envelopes in window, self-seal, security and check options. Marketing materials like brochures or catalogs can be larger than the standard sized envelope. Mailing envelopes come in 6x9, 9x12 and 10x13 sizes, so finding the best product for your larger business communication is easy. If efficiency is important to your order, we offer self-seal envelopes with a Peel and Seal strip. We offer a variety of options so you can find the best product for your business needs.

Business Envelopes

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Business Envelopes

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#10 Envelopes

Send checks, invoices or any 8 1/2x11 document folded into thirds in any of our #10 size business envelopes. This is the standard size for a variety of communication and a perfect choice for mailing letters, brochures, or other documents. Shop No 10 Envelopes.

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Window Envelopes

Use business envelopes with a window, to showcase pre-printed mailing or return addresses, contact information or company logos. Great for offering recipients a glimpse into envelope contents before opening. Available in many options. Shop Window Envelopes.

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Security Envelopes

Security business envelopes are ideal for sending sensitive mail with assurance of safe delivery. Their printed patterned interior ensures envelope contents cannot be read through a sealed envelope - even when held up to light.
Shop Security Envelopes.

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Self Seal Envelopes

Looking for convenient and efficient envelopes? Choose business envelopes with self-seal to save time before mailing. To seal, simply peel of the adhesive strip located on the flap and apply pressure to secure. No moisture required. Shop Self-Seal Envelopes.

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Check Envelopes

Need to send a standard business check? We offer a variety of check envelopes. Pick between single window or double window options - or select our Quickbooks Check Envelopes designed specifically for Quickbooks Accounting Software. Shop Check Envelopes.

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Payment Envelopes

Business envelopes come in a variety of sizes. Choose #6 3/4 payment envelopes to include with a #10 for return payments. Conveniently sized to fit a personal check and available in a variety of colors. These envelopes are ideal for a variety of uses. Shop Payment Envelopes.

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Not finding what you need? Have a question about a printed order? We would love to see if we can make your order - and life - a little bit easier.

Business Envelopes Size Guide

Not sure what size you need? Our Business envelopes come in a variety of popular sizes and styles. The most popular business envelopes are the #10 envelope, which fits a standard (8 1/2" x 11") document, folded into thirds. The 2nd most popular size is the #9 envelope, which is often used for business reply, or return mailing.

  • #6 1/2 - (3 1/2 x 6 1/4) Fits a personal check, plus a small insert - up to 3x6.
  • #6 3/4 - (3 5/8 x 6 1/2) Fits a personal check, plus a small insert - up to 3 1/2 x 6 1/4.
  • #7 3/4 - (3 7/8 x 7 1/2) Standard small envelope, most commonly used for personal checks.
  • #8 5/8 - (3 5/8 x 8 5/8) Can be used as a return envelope. Common for smaller checks.
  • #9 - (3 7/8 x 8 7/8) Return envelope. Fits comfortably inside a standard #10 envelope.
  • #10 - (4 1/8 x 9 1/2) Standard business envelope. Fits an 8 1/2 x 11 piece of paper folded in thirds.
  • #11 - (4 1/2 x 10 3/8) Larger than a standard envelopes. Can fit a #10 envelope, plus a document.
  • #12 - (4 3/4 x 11) Most commonly used for mailing larger documents, along with a #10 envelope.
  • #14 - (5 x 11 1/2) Often used for mailing folded larger documents. Can accommodate a #12 envelope.
  • 6x9 - Fits 5 7/8 x 8 7/8 insert, or an 8 1/2 x 11 piece of paper folded.
  • 6 1/2 x 9 1/2 - Fits up to 6 1/4 x 9 1/4. Provides extra room for bulkier 6x9 items.
  • 6x10 - Protect small items, jewelry, or parts during the shipping process.
  • 8 3/4 x 11 1/4 - Ideal for mailing standard size (8 1/2 x 11) documents.
  • 9 x 11 1/2 - Perfect for mailing larger stacks of standard (8 1/2 x 11) documents.
  • 9x12 - Fits 8 7/8 x 11 7/8 insert, or standard 8 1/2 x 11 paper.
  • 9 1/2 x 14 1/2 - Protect books, electronics, and other fragile items in transit.
  • 10x13 - Fits a 9 3/4 x 12 3/4 insert. Ideal for sending presentation folders.

What business envelope style is best for you? Here are the most popular styles:

  • Check Envelopes - Standard #10 window or double window. Used for business checks or statements.
  • Security Envelopes - These envelopes have an inside tint, designed to obscure enclosed information.
  • Double Window Envelopes - Used for mailing checks. Can be used for mailing Quickbooks checks.
  • Payment Envelopes - Smaller than a standard envelope. Often included when mailing a #10 envelope.

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