The 9 Best 9 Double Window Envelopes (2023 reviews)

The envelopes themselves look to be made of quality materials. It includes confidential account or client information, the envelopes feature plastic windows and an interior security tint that prevents documents from being read through the envelope when held up to the light. The glue holds up through a day of pre-teens tossing them around in their backpacks. The security pattern is effective in blocking the contents.

These envelopes are 3 7/8" x 8/78 inches and work with Simply Accounting, Account Edge, Quick Books and MYOB for invoices and statements. It is great for sending out quickbooks printed checks. The quality of the envelopes is good. It comes with the ceiling strips, which will save more time.

Why We Like This:

Thick enough for strength and privacy
Fits the standard sizing and window placement
Great quality and value for a small business
Enveloped and are intended for invoices and statements but not cheques

Best For money: Aimoh 9 Double Window Envelope

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Not everyone likes to purchase envelope for their daily usage, but the aimoh 9 double window envelope would be an anomoly. These are great, budget friendly envelopes. It is made from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. It can tear and or melt with certain machines. The self-seal makes it so easy and efficient.

The envelopes are sturdy and can handle the abuse of bulky letters and papers. It is perfect solution, with premium security tint, extra large, easily read dual front windows and super secure quick seal adhesive. These can be easily opened. The privacy of the envelopes is great.

Why We Like This:

Seams good, windows good, seals good
Perfect for quickbooks invoices and statement’s
Great quality envelopes, and strong self seal
Works great for quickbooks statements and invoices

Best For Mailing off letters: HERKKA 9 Double Window Envelope

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We would, of course, be remiss if we didn't mention herkka 9 double window envelope for daily purpose. It has 500 envelopes which can meet a long lasting supply, ideal for mass mailing of everyday business tasks. It is great for invoices or common documents. It has a blue printed pattern in the inside as an added measure of security. The security printing on the inside is good and will block anyone from viewing what's inside once it's sealed. The envelopes are self sealing, so you don't have to lick or otherwise wet the adhesive.

The windows are very clear and functional. The windows are perfect for mailing off letters.

Why We Like This:

10 dual window envelope, fits std checks
Peeling off glue is convenient as well
Delivers what they promise

Best For Your timeline: Quality Park 9 Double Window Envelope

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The quality park 9 double window envelope is suitable and reliable and fits well with your daily usage. Redi-strip envelopes increase efficiency with removable strips and adhesives that seal without moisture—simply peel and press. The unique double flap design allows you to simply raise the lower flap and press to seal. It measures 3-7/8" x 8-7/8 and has design for easy insertion. The reflex blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light.

It covers the top window is 1 3/16" x 3 1/. A special redi-seal closure doesn't require any moisture to seal. The easy seal design is fantastic because anyone wants to worry about taping or licking so many envelopes. The self-adhesive flap is very sticky and easy to seal and unseal if necessary. It is perfect for quickbooks invoices.

Why We Like This:

Makes stuffing envelopes a lot easier and quicker
Nice that they are self sealing and no paper to tear off
Super easy and can be opened and re-sealed in case of mistakes

Best For Check: Blue Summit supplies 9 Double Window Envelope

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Blue Summit Supplies offers a variety of envelope for personal choice and yet maintaining quality in all the variants. For everyday basics, this is the perfect inexpensive envelope. It saves you money on bulk business mailing of business statements, invoices, or checks. It works great as a return envelope, so you can get paid faster.

Great value envelopes work well, cut well, flaps adhere good, and the security feature is excellent. These are easy to open, close, and seal.

Why We Like This:

Super responsive and pleasant to deal with
Sturdy and secure, no seeing through the paper at all
Not super thick so you can still see through in the light

Best For invoice: Valbox 9 Double Window Envelope

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The valbox 9 double window envelope's superior materials makes sure that it ages well with use. These security envelopes feature high securtiy tint which will protect your confidential information. It comes with the strong adhesive flap, the Valbox #9 double window envelopes will be more evident if tampered. The contents are also easy to slip in. The windows line up perfectly with the return and sender address, eliminating the need for hand addressing or printing mailing labels, ideal for legal and standard business mailings, advertising campaigns and more.

The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones. It is great for quick use.

Why We Like This:

New and hot release
Delivers what they promise

Best For company: Iconikal 9 Double Window Envelope

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Compared with other envelope in this category, the iconikal 9 double window envelope has a convenient design. They are indeed security envelopes in that they are thick enough and their printed inner lining obscures the contents very well. The unique "Lift & Press" system of sealing the envelope is a step above removing a strip of paper backing to reveal adhesive. It is perfect for junk journaling.

These security envelopes are printed with a security tint on the inside to prevent see-through inspections and include tamper-evident, self-sticking permanent seals. It'd be nearly impossible to force the flap open once it is sealed, without disturbing these slits.

Why We Like This:

Great design and color inside envelopes
Good envelopes with basic features that deliver
New and hot release

Best For bulk mailings: Columbian 9 Double Window Envelope

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Columbian has been making great envelope for years, thanks to a combination of clever design and appropriate materials. These tinted envelopes have a reflex blue pattern that obscures the details of what's inside. It protects critical documents or your customers' sensitive data. A pull strip makes opening the envelope straightforward and prevents you from tearing the documents inside. It is ideal for mailing important documents or sending sensitive client information.

The box is about as thin, recycled cardboard as you can make. It has a double window option which is very nice to display information and the paper quality is good. The peel and stick part is very nice and very easy to use as well. It is suitable for business use and not home.

Why We Like This:

Nice envelopes using them for confidential postings
Paper and internal printing are enough to make them opaque
Forms line up perfectly in the windows

Best For Other confidential documents: PANDRI 9 Double Window Envelope

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We would, of course, be remiss if we didn't mention pandri 9 double window envelope for regular usage. Sending and mailing addresses can be clearly displayed for standard business and legal mailings, advertising campaigns etc, reducing the hassle of handwritten addresses, top window. It has 500 quality #9 double window envelopes for a long lasting supply, perfect for bulk mailings. It comes with security tint for privacy and is used to protect sensitive data.

These envelopes are the right size and the windows are in the perfect location for these invoices. It fits with no creative folding. The peel off and stick strip works perfectly and seals tightly. It is perfect for secure business and legal mail, invoices or other confidential documents. It comes with a plastic film on both spots.

Why We Like This: