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#10 Single Right Window Security Envelopes, Latex Seal, 500 Count

  • Durable and professional go-to standard business envelope for mailing invoices, statements, and other office mailing needs with the address formatted on the right.
  • Roomy enough for a return envelope to be included, so you can get paid faster.
  • Low profile flap design creates a wide opening for easy and quick envelope stuffing.
  • Self-seal latex gum design means quick, easy, and guaranteed to stay sealed. Just press the flap down and your envelope is sealed.
  • Dark security tint lining keeps your important documents securely concealed throughout transit.


It’s no secret that the #10 security envelope is the workhorse of business mailings, and we’ve designed our latex adhesive self-seal #10 envelope to keep your documents safe and secure behind a strong permanent seal throughout transit.

This right-hand window take on our most popular business envelope is made from a durable 24lb white wove paper and comes equipped with a low profile flap design, which makes it easy to fold and stuff up to 10 sheets of standard letter size paper inside with room for a #8 or #9 return envelope as well – so you can make it simpler than ever for your clients to quickly return payments to you. And with our dark security tint lining the inside, your confidential mail will stay concealed and secure all the way to its destination. It’s an envelope choice that’s simple enough for everyday letters and statements, yet professional and secure enough for even high-profile business communications. 

#10 Single Right Window Diagram

We stand behind our products completely. We understand that buying products online can sometimes be difficult because you cannot physically see what you are buying; however, if our product is not exactly what you are looking for or does not meet your expectations, then we welcome you to send them back anytime for a 100% refund. Click here for more information regarding refunds or returns >

Key Features:

  • #10 single window envelope
  • Dimensions: 9 1/2 inches X 4 1/8 inches
  • Security lining
  • 24lb white wove paper
  • Package quantity: 500 Count


  • This envelope is not suitable for printing in a laser printer, as the heat will melt or warp the windows.
  • The window is positioned on the right-hand side.
  • While this envelope will work with QuickBooks invoices, it is NOT suitable for sending QuickBooks checks, as check information will not line up properly in the windows. Please click here for envelopes suited for mailing QuickBooks checks.
  • Not sure what type of number 10 envelope is right for you? Read our blog post about #10 envelopes, wherein we help you wrap your head around every detail you never knew you needed.

Product Details:

  • Brand: Blue Summit Supplies
  • Part #: BSS-92588-032
  • SKU: BSS-92588-032
  • Barcode: X0023RVHGF
  • Package dimensions: 11.5 x 9.8 x 4.5 inches
  • Package weight: 7 pounds