500 No. 10 Gummed Double Window Security Envelopes – Perfect Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes – Number 10 Size 4 1/8 X 9 ½ Inch

(10 customer reviews)


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Perfect for mailing Invoices, QuickBooks Invoices, billing statements, checks, and other business mail. Your return and sender address will line up perfectly Just moisten or lick and seal for a strong lasting seal. Our Cost Effective gummed seal design will quickly and easily create a strong seal for completely secure business mail. No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Provides complete business mail security: your business mail will be completely hidden with our dark security tint design

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SKU: B01N31J4TF Category:

Product Description

Blue Summit SuppliesBlue Summit Supplies


Save Time and money Sending Business mail with our # 10 Double Window Security Envelopes

Quickly and easily send hundreds of pieces business mail with our #10 envelope design and our cost saving gummed flap design.

  • Our gummed seal flap with low profile window design creates a wide opening so you can quickly stuff several invoices into the envelope. These envelopes prevent invoices from getting stuck during stuffing
  • Once sealed, no adhesive is exposed so you do not have to worry about the envelope sticking to other mail

Business mail will be completely secure during transit

It can be so difficult to find envelopes that create a strong lasting seal thus forcing you to waste time using glue sticks or tape to close the envelopes. Our Durable #10 envelopes with strong adhesives are designed to immediately create a strong seal so you do not have to worry about your contents being exposed to others.

Unlike weak sealing envelopes that allow your contents to fail out and become exposed, So much for a security envelope, Our strong seal will ensure the safety of your contents.

Security with a Professional Look

It can be frustrating to purchase envelopes only to find them flimsy enough to have you worried about their durability during transit.

24 LB White Wove Paper that creates a professional look and feel from out of the box all the way to your destination


‎Blue Summit Supplies


‎Blue Summit Supplies

Item Weight

‎0.16 ounces

Product Dimensions

‎8.5 x 12 x 4.5 inches

Is Discontinued By Manufacturer






Material Type


Sheet Size

‎4.125-x-9.5-inch Inches

Manufacturer Part Number






Customer Reviews

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Best Sellers Rank

#27,996 in Office Products (See Top 100 in Office Products) #78 in Business Mailing Envelopes

Date First Available

January 5, 2017

10 reviews for 500 No. 10 Gummed Double Window Security Envelopes – Perfect Size for Multiple Business Statements, Quickbooks Invoices, and Return Envelopes – Number 10 Size 4 1/8 X 9 ½ Inch

  1. Nancy

    These work just as well as the ones I have bought from office supply store for years at a fraction of the cost. I will buy them as long as they are the best deal

  2. Jerry

    Great envelopes for the money. Yes, I would buy them again.

  3. Ransom

    works for me

  4. John R

    they fit address and return address

  5. TRubin

    Perfect for my needs

  6. Bill M

    I haven’t checked all 500, but the envelopes I checked look fine, arrived ahead of schedule, and will do a great job for us

  7. Anna

    Great envelopes. I give 5 stars because they were all handled perfectly through shipping and arrived without one even slightly bent. I use these in a Neopost SI-62 folder/inserter and these are by far the most consistent I have found. Never jams thanks to the high quality!

  8. Jennifer Hamilton

    Great value for the money and the great part is that I didn’t have to fight the crowded stores to get them!

  9. Becky L. Olson

    So glad I finally got some of these!

  10. Amazon Customer

    These are perfect for sending out my monthly statements. Good value.

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