The 10 Best letter Size Window Envelopes (2023 reviews)

We consider a letter size window envelope to be a worthy investment in the long run. We are here to help you choose the right one for your needs from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Amazon Basics letter Size Window Envelope READ REVIEW

Best For Printer: Buy: Blue Summit supplies letter Size Window Envelope READ REVIEW

Best For money: Buy: Aimoh letter Size Window Envelope READ REVIEW

Best For Check: Buy: HERKKA letter Size Window Envelope READ REVIEW

Best For invoice: Buy: Blue Summit supplies Great Product READ REVIEW

Best For Mailing off letters: Buy: HERKKA unique Window READ REVIEW

Best For letter: Buy: Aimoh super Secure Seal READ REVIEW

Best For everyday Business Use: Buy: Bazic products letter Size Window Envelope READ REVIEW

Best For Pack: Buy: Envelopes.Com letter Size Window Envelope READ REVIEW

Best For Compatibility With Most Printer models: Buy: Luxpaper letter Size Window Envelope READ REVIEW

Best Overall: Amazon Basics letter Size Window Envelope

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The amazon basics letter size window envelope's material feels more premium than its price would suggest. The peel off sticker is easier and more convenient than one you have to damped. It is available in peel & seal or moisture seal. The self adhesive strip is great. It is perfect width to catch and hang up a tri-folded letter when hand stuffing the envelope.

These are nicely opaque in terms of not being able to read through, although it's easy enough to make out the shape of a check under bright light. They have the security on the inside. It can not be easily opened after its been sealed.

• Very very good quality, glue, and ease to use
• Prevents reading important documents thru the envelope
• Good enough envelopes in a shoddy enclosure

Best For Printer: Blue Summit supplies letter Size Window Envelope

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Blue Summit Supplies is known for creating pragmatic and minimalist envelope for people on the go, and its line of blue summit supplies letter size window envelope definitely falls in line with that reputation. It saves you money on bulk business mailing of business statements, invoices, or checks. It's a normal window envelope, the window is in the right place, it has glue on the flap, it's made of paper and a stamp & return address can be stamped/stuck to it. There is plastic covering the window.

The employee name and address fits perfectly in the window. It is great, value for the amount you get and great envelopes.

• Good quality, good folds, gummed flap, no holes
• Sticks great, tastes like the floor
• Works perfect to mail checks from quickbooks

Best For money: Aimoh letter Size Window Envelope

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The aimoh letter size window envelope should be able to handle its purpose and duties with ease. These envelopes are great for QB checks. It is manufactured from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. The size is right so they don't wiggle out of alignment with the windows but the check slides cleanly into the envelope. There is plastic on the windows.

These fit snugly so that cheques don't move around while in transit but are still reasonable to stuff. It fits quickbooks checks perfectly to add to that it is great with deluxe triple business checks.

It is ideal for business and home office use.

• Thick envelopes and super great adhesive
• New and hot release

Best For Check: HERKKA letter Size Window Envelope

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate envelope. The herkka letter size window envelope is exactly that - it's a simple envelope that hits all the right notes. If you are using quickbooks for your small business these will fit standard sized business checks. They are smooth, clean lines, and beautifully white envelopes. The envelope has a premium security tinted pattern and ultra strong easy seal. There is a little left-to-right movement of the document to take into account for the window addresses.

The security printing on the inside is good and will block anyone from viewing what's inside once it's sealed. The adhesive is good enough to keep them closed. The windows are very clear and you can fit a standard size letter in it. These are also not too sheer and are the perfect size to fit a letter.

• A good value for double window business envelopes
• 10 dual window envelope, fits std checks
• One of the new comers and featured product

Best For invoice: Blue Summit supplies Great Product

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The blue summit supplies great product's superior materials makes sure that it ages well with use. These envelopes are so easy to use and seal. It is perfectly for quickbooks. It is really easy to use so you can send invoices and statements quickly with no wasted plastic strips from the peel and seal design. The top is 3 1/2 inches wide and 1 inch high. They do the job and are fairly well made.

These are great to put stuff inside like folded paper and then you can mail that paper to others. It will work for checks and invoices. It is easy to use, but the adhesive could be stickier.

• Super easy to insert letter and then place invoice and flip and seal flap
• Easy to use, the windows are perfect
• Uickly seals with ease, plus no licking or peeling off
• Perfect size for a variety of mailings

Best For Mailing off letters: HERKKA unique Window

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If you are looking for a reliable envelope for your daily usage, you cannot go wrong with the herkka unique window. These are just fine and functional envelopes. They have a flip and seal design that makes it easy to close them without any hassle. The back flap has a strip you can peel open, exposing the glue underneath, and you simply press and seal. The security feature helps to block what is inside the envelope. They do have a gap between the sealing strip and the edge, as opposed to the old gummed envelopes which usually go right to the edge.

These are SUPER cool and easy to use. It is great for invoices or common documents.

• 10 dual window envelope, fits std checks
• All materials (paper, plastic, glue) make it a great-quality product
• A good value for double window business envelopes

Best For letter: Aimoh super Secure Seal

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The aimoh super secure seal is satisfactory and appropriate and fits well with your regular usage. These envelopes are priced great and a good envelope. It is manufactured from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. The sticky strip is great and makes it so much easier to close.

The self-sealing envelopes are nice and work well. It is self adhesive after one removes the backing on the gummed part of the flap. The security feature is great. These work fine and the windows are large enough to make it easy for the address to be seen.

• Easily read dual windows for everyday business mailings to easily display postal addresses
• Perfect self-adhering envelopes for mailing checks and/or invoices
• Combining a professional security tint pattern and smooth finish

Best For everyday Business Use: Bazic products letter Size Window Envelope

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We would, of course, be remiss if we didn't mention bazic products letter size window envelope for daily usage. These 3 5/8" x 6 1/2" inch envelopes are designed with security print to protect contents and sensitive information, perfect for protecting sensitive information from others. It features printed lining inside for privacy to make sure it is not see-through. These envelopes can easily fit invoices, letters, checks, gift cards, etc. It has 3 cut marks on each flap.

These are made to be secure and actually stick well. The envelopes are good, a little pricy for the amount they carry, but are fairly sturdy and well crafted. It is perfect for everyday business use, these standard white envelopes are crafted of heavy, durable 20lb paper and securely holds hefty files during transit.

• Perfect for mailing invoices, billing statements, checks, and other business mail
• New and hot release

Best For Pack: Envelopes.Com letter Size Window Envelope

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Compared with other envelope in this category, the envelopes.com letter size window envelope has a convenient design. If you're looking for the perfect Envelopes, the #10 Right Side Window Envelopes (4 1/8 x 9 1/2) in 24lb. This window does have a plastic/poly cover.

• Good stock and window works with most printouts
• Conforms with standard return mailing address format for credit card statements
• Good investment for long term

Best For Compatibility With Most Printer models: Luxpaper letter Size Window Envelope

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If you want a high-quality envelope, this is the item for you. It is made from heavyweight lux paper stock with a sturdy construction, these envelopes are thick and durable, making them perfect for things like letters, professional mailings, personal mail, or catalogs. The rectangular-style back flap adds a professional touch that you won’t find with other sets of similar envelopes. No matter what you address these envelopes with, you’ll be impressed with the high-quality, smudge-proof paper.

These envelopes are versatile, easily transitioning from formal to playful depending on what you need. It is perfect for anyone who doesnt want to lick or use a moistener on every single envelope. It is made for compatibility with most printer models. These envelopes are printer friendly, so you can use your home laser or inkjet printer to address them. It is great for business applications, wedding announcements, and personal notes.

• You’ll get a great seal every time, no moistening required
• Good brand reputation