The 12 Best LONG Security Envelopes (2023 reviews)

If you are currently in the market looking for a reliable envelope for your daily usage, you cannot go wrong with the aimoh every pack. These business envelopes are of excellent quality and weight. It is manufactured from heavyweight extra white sturdy wove stock paper, combining a professional security tint pattern and smooth finish. It has a rip off sticky tab so. The security is excellent and they seal great. It comes with a convenient peel-and-stick flap, saving time and ensuring all documents stay enclosed.

These opaque bright white staples envelopes allow for easy address viewing and viewing. The Sturdy construction and the adhesive is strong and secure. It is perfect for everyday business correspondence and large mailing tasks.

Why We Like This:

Peels easy and yet is secure for contents
Perfect balance of thickness and economy
Perfect envelopes for sending checks, etc

Best For Price: Aimoh LONG Security Envelope

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The aimoh long security envelope is suitable and reliable and fits well with your daily usage. These envelopes flawlessly hold letters. It is used for letter writing. The glue truly holds and the seams are strong. It is made of sturdy stick. Compared to the envelopes having to be sealed by licking them, these are so much more sanitary. The adhesive is strong. These envelopes are sturdy and the self seal has a good adhesive. They seal easily and are made of decent paper.

Why We Like This:

Nice heavy duty envelopes with great adhesive
Good paper and nice peel and stick closure
Reasonably substantial thickness, self sealing works well

Best For Great sealing: Quality Park Good Price

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The quality park good price's material feels more premium than its price would suggest. These time-savers eliminate the hassle of everyday and large bulk mailings. They are a nice, bright white. They envelope things like folded paper that one puts into them, and they seal. It opens easily enough and it is noticeable that it has been opened and resealed. They are letter size with nice enough thickness and adhesion. It is easy to use and letters fit nicely in them. This is a good amount of envelopes for personal use without having to pay for a pack of.

Why We Like This:

Great quality and easy to use envelopes
New and hot release

Best For Secure mailings: Valbox LONG Security Envelope

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These envelopes are very nice and secure. The ADHESIVE LOOKS TO BE STICKY. The paper is so nice and smooth and has a thicker weight than the cheaper envelopes. The adhesive strip covers the length of the envelop and is substantial enough to completely secure the contents inside. The envelopes do stick well, and they hide the contents well.

This box of envelopes, by itself, is quite heavy too. They stay sealed & are the typical long business envelopes.

Why We Like This:

Nice envelopes, strong heavy secure paper
Love the security, size and shape
Good investment for long term

Best For short notes: Quality Park LONG Security Envelope

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We would, of course, be remiss if we didn't mention quality park long security envelope for regular usage. These extra security features are essential for sending checks or personally identifiable information (pii) through the mail. It protects yourself and customer/client data with security features that keep personal information confidential while in transit. The paper is thicker with a printed security pattern and a self-sealing feature. Envelopes increase efficiency with removable strips and adhesives that seal without moisture—simply peel and press. It is good for paying contractors checks or cash.

These time-savers eliminate the hassle of everyday and large bulk mailings. The security tint is more than adequate and the paper is high quality 24 lb. It is perfect for home uses tightly.

Why We Like This:

Great size and security for items mailed
Easy to seal and great privacy envelopes
Good brand reputation

Best With A Window: Mead LONG Security Envelope

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Compared with other envelope in this category, the mead long security envelope has a convenient design. These are your standard, no-frills security envelopes with moisture-activated (i.e., lick it) glue seals. If you are just enclosing half a sheet or less (like a check), the Columbian brand is a more durable. The BOX HAS A GREAT SWOOSH DESIGN AND IT IS EASY TO OPEN. It has a secure, marked inside, paper with a self seal flap. The adhesive works, and the envelope holds together.

These are nice and sturdy and have a nice privacy shield. IT CAN TRAVEL ANYWHERE, NEW JERSEY, MOROCCO, EVEN YOUR MOTHER'S HOUSE IF YOU WOULD ONLY WRITE ONCE IN A WHILE.

Why We Like This:

Easy use and no problem placing in printer
Not too sheer, seals nicely, gets the job done
One of the new comers and featured product

Best For Laser Printer: Amazon Basics reasonable Price

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The amazon basics reasonable price is capable of outshining several other envelope featured in this list in overall features for the price point. It holds its weight. It can be used in inkjet printers. The envelope is also a nice weight in the hand. It will hold 3 or 4 sheets of tri-folded regular printer paper for mailing purposes. The box is extremely wide. It has security printing on the interior so nothing shows through. The security feature is an added bonus.

Why We Like This:

Nice quality, thicker paper, and good glue coverage
Not too thin and work well
Good quality, and go through printer without wrinkling
Super value for a huge box of security envelopes

Best With logo: Blue Summit supplies LONG Security Envelope

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Best part: blue summit supplies long security envelope costs comparatively low and it is available to ship in 24 hours. These envelopes are designed for both laser and inkjet printers. They are perfect for every day life. They are made from heavy stock, have security linings, and are self-sealing. They are secure in that they are not see-through and are self adhesive.

These envelopes have a security tint printed on the inside of the envelope, therefore it should keep others from seeing what is inside the envelope. The cover strip on the seal removes easily. They are easy to write on so you can address them without a problem.

Why We Like This:

Handy and no nasty taste having to lick the closure
Superior product and a personal touch
Durable and has a nice secure seal
Easy to use and sticks closed well

Best For company: Horchen LONG Security Envelope

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The Horchen #10 self seal envelopes are available in 100 packs in each set, and one set can meet your daily needs in a long period of time. This kind of design will help you to print the information like address quickly when you use an inkjet printer, saving your effort and time. The envelope paper is thick, but not bulky. The self stick flap works flawlessly—no leftover pieces of the guard strip remaining and adhesion to the body of the envelope is excellent.

The envelopes are designed with self seal, so you don't need glue or tapes to seal this type of envelope. It provides a better writing experience and also it is designed with adhesive quick seal, which is strong enough to create a full, wide and secure closure on the envelope. The paper weight of the envelopes is pretty standard and adhesive is good. These are a nice thickness so that the contents won’t show through.

Why We Like This:

Great envelopes, roomy and super quality paper
Good investment for long term

Best For Mailing Checks: Amazon Basics LONG Security Envelope

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These are check sized envelopes. The pack of 100 is great for keeping a stock on hand for all your mailing needs. They’re peel & stick security envelopes. The security design inside hides the contents, and the peel-and-stick feature is convenient, especially if you have to mail a lot of items at once.

These envelopes are lined well enough that a check cannot be seen through the envelope. The adhesive sticker could go further to the flap edges. These work great, the self sealing is amazing, no more having to lick the glue. The security tint makes it difficult for anyone to see through the envelope, which is great for added privacy.

Why We Like This:

Perfect for when you just want to send a check or small note/letter
One of the new comers and featured product

Best With Two address: Prime Business Checks LONG Security Envelope

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The prime business checks long security envelope is capable of outshining several other envelope featured in this list in overall features in its price range. These are high quality envelopes and are very reasonably priced. It is designed to fit quickbooks laser checks or any computer business checks, these business envelopes fit checks perfectly, with dual windows displaying essential information without leaking out sensitive details. It has a thick, sturdy paper and a really good adhesive that completely and securely closes the envelope. The self seal sticks very well and the envelopes fit the checks perfectly. The window placements match up perfectly and don't allow additional information to peek through.

The amazing quality and strong seal is great fits to perfection.

Why We Like This:

Even glue and easy to peel
Works perfectly with business checks printed out of financial edge
Good investment for long term

Best For Mailing off letters: HERKKA LONG Security 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 has a blue printed pattern in the inside as an added measure of security. The paper quality is excellent.

These are standard letter sized double window envelopes. It is perfect for mailing off letters. The security pattern is effective when held up to the light.

Why We Like This: