Hero image 0 of Staples InstantSeal Security Tinted #8 Double Window Envelopes 3 5/8" x 8 5/8" White 500/Box, 0 of 5
Staples InstantSeal Security Tinted #8 Double Window Envelopes 3 5/8" x 8 5/8" White 500/Box
Key item features
- Secure Sealing: Features an InstantSeal, pressure-sensitive adhesive that requires no moisture for a secure hold, along with a tamper-proof, perforated seal for document safety.
- Privacy Tint: Includes a security-tinted pattern designed to discourage reading sensitive information through the envelope's exterior.
- Dual Windows: Equipped with double windows for easy display of both return and shipping addresses, eliminating the need for manual label application.
- Optimal Dimensions: Measures 3 5/8"H x 8 5/8"L, with a top window of 7/8" x 3-1/2" and a bottom window of 1" x 4", suitable for various mailing needs.
- Convenient Supply: Provided in a box of 500 white #8-5/8 business envelopes, ensuring an ample supply for managing large mailing projects.
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Specs
- Envelope size3 5/8" x 8 5/8"
- Envelope typeDouble Window Envelopes
- ColorWhite
- Envelope closure styleSelf-Adhesive
- PatternSecurity-tinted
- BrandStaples
Current price is USD$39.99
Price when purchased online
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About this item
Product details
Make mailing projects manageable with this 500-pack of white Staples InstantSeal security-tinted double-window #8-5/8 envelopes.
Handle giant mailing projects with ease by using these white InstantSeal security-tinted double-window envelopes. Each one features two transparent windows to let the return and shipping addresses show through, removing the need for manual label application, while the security-tint design helps ensure third parties don't read private information. These security-tinted double-window envelopes are self-sealing, so you don't need to lick the flap or use a sponge.
• New and improved envelope.
• Tamper proof, perforated seal to keep documents safe.
• Pressure sensitive adhesive requires no moisture for a secure hold.
• Just pull the bottom flap up and fold the top flap down to seal.
• #8-5/8 business envelopes are suitable for all your mailing needs.
• These envelopes measure 3 5/8"H x 8 5/8"L in size, providing enough space for your mail.
• Dimensions: Top Window Dimensions: 7/8" x 3-1/2", 5/8" from Left, 2-1/4" from Bottom. Bottom Window Dimensions: 1" x 4", 5/8" from Left, 5/8" from Bottom.
• White color is ideal for business or personal correspondence.
• Actual dimensions may vary by up to ~1/8”.
• Security-tinted pattern helps to discourage reading sensitive information through the outside of the envelope.
• Double-window envelopes for easy display of addresses.
• Convenient box of 500 envelopes ensures ample supply.
• The flap is on the long side for ease of use.
• Sold as 500/Box.
Handle giant mailing projects with ease by using these white InstantSeal security-tinted double-window envelopes. Each one features two transparent windows to let the return and shipping addresses show through, removing the need for manual label application, while the security-tint design helps ensure third parties don't read private information. These security-tinted double-window envelopes are self-sealing, so you don't need to lick the flap or use a sponge.
• New and improved envelope.
• Tamper proof, perforated seal to keep documents safe.
• Pressure sensitive adhesive requires no moisture for a secure hold.
• Just pull the bottom flap up and fold the top flap down to seal.
• #8-5/8 business envelopes are suitable for all your mailing needs.
• These envelopes measure 3 5/8"H x 8 5/8"L in size, providing enough space for your mail.
• Dimensions: Top Window Dimensions: 7/8" x 3-1/2", 5/8" from Left, 2-1/4" from Bottom. Bottom Window Dimensions: 1" x 4", 5/8" from Left, 5/8" from Bottom.
• White color is ideal for business or personal correspondence.
• Actual dimensions may vary by up to ~1/8”.
• Security-tinted pattern helps to discourage reading sensitive information through the outside of the envelope.
• Double-window envelopes for easy display of addresses.
• Convenient box of 500 envelopes ensures ample supply.
• The flap is on the long side for ease of use.
• Sold as 500/Box.
- Sold as 500/Box.
- New and improved envelope. #8-5/8 business envelopes are suitable for all your mailing needs. Actual dimensions may vary by up to ~1/8”. The flap is on the long side for ease of use.
- Tamper proof, perforated seal to keep documents safe. These envelopes measure 3 5/8"H x 8 5/8"L in size, providing enough space for your mail. Security-tinted pattern helps to discourage reading sensitive information through the outside of the envelope.
- Pressure sensitive adhesive requires no moisture for a secure hold. Dimensions: Top Window Dimensions: 7/8" x 3-1/2", 5/8" from Left, 2-1/4" from Bottom. Bottom Window Dimensions: 1" x 4", 5/8" from Left, 5/8" from Bottom. Double-window envelopes for easy display of addresses.
- Just pull the bottom flap up and fold the top flap down to seal. White color is ideal for business or personal correspondence. Convenient box of 500 envelopes ensures ample supply.
info:
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Specifications
Envelope size
3 5/8" x 8 5/8"
Envelope type
Double Window Envelopes
Color
White
Envelope closure style
Self-Adhesive
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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Showing 1-3 of 17 reviews
Nov 4, 2025
Silena
5 out of 5 stars review
Great quality and perfect size
[This review was collected as part of a promotion.] I was pleasantly surprised by how sturdy these envelopes are. The paper feels durable and private, not flimsy. They seal well without needing extra tape. The #8 size is just right for mailing checks, small letters, or folded documents, and they fit perfectly in my desk organizer. The quantity is generous (I was surprised), so I won't run out anytime soon. Overall, great value and dependable quality, exactly what I expect from Staples!
Review from Staples
Helpful?0YF8E5GFH73O5284497976
Oct 31, 2025
BiznessGuy
5 out of 5 stars review
Clean and Professional
[This review was collected as part of a promotion.] These envelopes were just what I needed. They look clean and professional, and the quality is solid — not flimsy at all. The size was exactly as described, and the pack came with plenty to get me through a bunch of mailings. My favorite part is how nice and neat they look when sealed — very polished. I'll definitely be using these again for all my mailing needs.
Review from Staples
Helpful?0YF8E5GFH73O5284497976
Oct 31, 2025
Vanessa
5 out of 5 stars review
A Perfect Shipping Option for my Small Business
[This review was collected as part of a promotion.] In my small business, I have to send monthly invoices to clients. I usually pick up small packages of windowed envelopes but was excited to be given the chance to try this bulk option by Staples. My first impression is that the quality and security are great. The envelopes feature a security lining that keeps my client's information secured. The paper is not flimsy and the adhesive is strong. The size is perfect for not just a single sheet of paper but multiple (my statements are 5+ pages and they fit perfectly). Having a box of 500 means no more frequent restock trips to the store. All in all, I think this bulk envelope is well designed, sized and packaged for small and mid sized businesses alike.
Review from Staples
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