The 9 Best 10 Security Window Envelopes (2023 reviews)

The latest herkka unique window is an absolute beast in terms of its features, and rightfully takes the top spot with ease. These are standard letter sized double window envelopes. They have a flip and seal design that makes it easy to close them without any hassle. If you are using quickbooks for your small business these will fit standard sized business checks. These are just fine and functional envelopes.

The envelope has a premium security tinted pattern and ultra strong easy seal design that makes it easy to close them without any hassle. The envelopes are self sealing, so you don't have to lick or otherwise wet the adhesive. These are also not too sheer and are the perfect size to fit a letter. It is great for invoices or common documents.

Why We Like This:

All materials (paper, plastic, glue) make it a great-quality product
Good adhesion, and no problem with removing the strips
Good brand reputation

Best For Printer: HERKKA 10 Security Window Envelope

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If you’re looking for the perfect security envelopes with professional security tint, and strong, quick seal strips, in a great value 500 envelope supply, perfect for everyday use, herkka #10 security tint envelopes are the perfect choice. It has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks. It is ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office.

These envelopes stay sealed, are not transparent and can be stuffed easily with standard printer paper. There is a plastic film over the window. It is compatible with most inkjet and laser printers for easy printing.

Why We Like This:

Large, windowless design measuring 4-1/8 x 9-1/2 inches
Awesome value, good paper, great toner adhesion from the printer too
One of the new comers and featured product

Best For money: Blue Summit supplies 10 Security Window Envelope

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Next on the list, we've got yet another envelope that manages to win our hearts. It's the blue summit supplies 10 security window envelope and it's widely considered as one of the best convenient envelope you can buy. It is so much easier than driving to several places looking for them. It is a really good looking, high-quality envelope that prints really well. The Self-sealing flap with strong self-sealing adhesive makes for quick and easy mass mailings, saving you money on bulk business mailing of business statements, invoices, or checks. The clear window will melt if you attempt to print to these with a laser printer.

The envelope can be unsealed with minimal effort and resealed relatively easily, so it would not be appropriate for some things like sending checks or sensitive information. It is perfectly no additional tape needed.

Why We Like This:

Good brand reputation
Delivers what they promise

Best For sending out Invoices: Valbox 10 Security Window Envelope

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If you often find yourself scrambling for convenient and suitable envelope, valbox 10 security window envelope should be your first option for buying. These are a much needed upgrade from the handwritten addresses/basic envelopes. The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones. It is ideal for legal and standard business mailings, return documents and more. The windows line up perfectly with return and sender address, eliminating the need for hand addressing or printing mailing labels, ideal for legal and standard business mailings, return documents and more.

These security envelopes feature high securtiy tint which will protect your confidential information. It comes with the strong adhesive flap, and the valbox #10 double window envelopes will be more evident if tampered. It is great for sending out invoices.

Why We Like This:

Fit quickbooks invoices and business billing statements perfectly
New and hot release

Best For Check: Aimoh 10 Security Window Envelope

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The aimoh 10 security window envelope should be able to handle its purpose and duties with ease. It's made from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. They're heavier and stronger. It is perfect for invoices, statements and many more business uses.

Why We Like This:

Combining a professional security tint pattern and smooth finish
Delivers what they promise

Best For Your timeline: Quality Park 10 Security Window Envelope

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These envelopes make stuffing and sealing so much faster. It works out better and you don't have to pull off the strip. It is easy to use a no-nonsense #10 envelope with window. The way the flap is folded when it is in the box, it does not stick to other envelopes or itself. The envelopes are great & the value is fabulous.

These envelopes are inexpensive and easy to order. They are not heavy-weight, but it does get the job done. They are perfect for when your budget and your timeline are tight.

Why We Like This:

Nice security tint and secure windows, good, consistent construction quality
Inexpensive, easy to use and secure
Self sealing left window envelopes are great for sending out work related letters

Best For invoice: Blue Summit supplies Seal Flap

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We would, of course, be remiss if we didn't mention blue summit supplies seal flap for regular usage. They tend to take a little more time than the other type to get check inserted and sealed. It is easy to use so you can send invoices and statements quickly with no wasted plastic strips from the peel and seal design. The envelope is 9.5 wide so the document can slide around. They adhere well, they’re easy to fill and you save so much garbage by the lift to seal method. The security print is good and they are self sealing without a "pull strip" which is nice.

Why We Like This:

Enough room for return envelopes so you can get paid faster
Perfect for mailing invoices, quickbooks invoices, billing statements, checks, and other business mail
Lot of satisfied buyers

Best For Standard computer Check: PANDRI 10 Security Window Envelope

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The pandri 10 security window envelope's material feels more premium than its price would suggest. The double window design allows for the mail carrier to know who the envelope is going to & coming from. It is perfect for secure business mail, invoices, bills, checks and other business mail. The security pattern is present on both front and back sides of the inside of the envelope. The windows make it very easy to determine where it is sent from & to whom it is addressed to.

Using the inner grain secrecy printing technology, the secure tone backing makes the envelope hard to see through and ensures the privacy of your invoices and statements under the light without any prying eyes. These get the job done without having to lick. It is built for a standard computer check.

Why We Like This:

Makes billing a piece of cake
Well made, secure, and adhesive sticks
Makes for quick work with bills & paychecks
Good adhesive strip, all around a normal and typical envelope

Best For Other confidential documents: PANDRI Security Envelope

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Pandri has been making great envelope for years, thanks to a combination of clever design and appropriate materials. These envelopes have a nice security printing inside. The window is still intact and the peel-off adhesive still works as it should. The best part is these come with a cover on the adhesive that you can quickly remove and then stick down the top of the envelope. It comes with security tint for privacy and used to protect sensitive data.

These envelopes are packaged in a way that you can just cut off the top part of the box and you can easily retrieve the envelopes thereafter. It comes with inner grain secrecy printing and secure tone backing, the content, data and numbers are protected from easy reading and from any prying eyes even under the light.

Why We Like This: