Price: $23.44
(as of Sep 24, 2025 11:10:15 UTC – Details)
Columbian #10 Security Envelopes are the perfect all-purpose envelope for letter-sized business documents. Each #10 envelope is 4-1/8 x 9-1/2 inches; designed to fit a letter size sheet (8-1/2 x 11 inches) folded into thirds. Security tinted envelopes have a scrambled blue pattern printed on the interior that conceals the contents. The Release & Seal strip peels right off so you can press to seal without any moisture. These self seal envelopes are inkjet printer compatible, though not recommended for a laser printer (use address labels instead). 24 lb white wove paper with side seams give these business envelopes a professional appearance. Overall envelope dimensions are 4-1/8 x 9-1/2 inches. White. Box of 500.
Get a jumbo box of 500 Columbian self seal #10 envelopes (4-1/8″ x 9-1/2″) each with a security tinted interior and easy peel off Release and Seal closure
These self seal envelopes have a Release and Seal peel strip; peel off the paper strip and press down for a permanent seal; it’s simple, clean, and sanitary with no moisture required
Security envelopes have a strong security tint pattern so you can’t see what’s inside; ideal for obscuring more sensitive information and protecting critical documents
Side seam mailing envelopes allow for a smooth, fold-free back panel for printing graphics, logos, and more; durable 24 lb white wove paper provides a professional look
Stock up on these envelope 500 packs so you always have some on hand; a great buy for small businesses, offices, and schools
Customers say
Customers find these envelopes well-made and easy to seal, with good adhesion and value for money. They are particularly useful for daily deposits, and one customer mentions they work well in printers. The thickness receives mixed feedback, with some finding them thick while others describe them as very thin. The security feature also gets mixed reviews.
šØ Creative Pick: Selected by our Art Stationers team for quality & inspiration.
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Nathan Bredenberg –
I think bought enough envelops
Valued for the money, while buying these decently thick durable fit and functional envelopes because I didnāt have a girlfriend to talk me out of it. Just like I donāt have one to write all these letters to anymore. So instead I choose to write to companies that I am disappointed in hoping to get a satisfactory responses of some sort but thatās wishful thinking is like spilling a large amount of mustard into the lap on your favorite white Bee Geeās outfit singing you can do anything you want because I plan on staying alive. Ah ah ah ah staying aliveeeeeee liveeeeeee yeahhhh. No more licking envelopes that taste worse than watching Borat in his swimsuit while he does a dance. Very Nice. I like. Wow wow wee wow. Yes I would buy this product again and repurchase them if I had to while living in Kazakhstan or anywhere else.
haggis –
Good basic envelopes
Prints well in a laser printer. Fairly thin but seems thick enough to stand up to shipping. Glue strip is easy to peel. Pro tip for anyone who experiences smudging after printing envelopes in a laser printer, go into the settings menu on the printer and turn the fuser to envelope setting, or if you don’t have an envelope setting, just turn the fuser heat up slightly. Since envelopes are thicker than normal paper they may need a little bit more heat. These being relatively thin though, they printed just fine in my HP laser printer without needing to adjust the fuser at all.
Doug Adams –
Easy to seal
Great envelope, easy to close high quality
Sami Joe –
professional quality
just what I needed and works great made very well with good quality and love the added sticky strip so I don’t have to lick it every time. very professional look.
Beverly –
Good quality envelopes!
Good quality , seal very well. Good price!
Debra A. Bullington –
Excellent value!!
So many envelopes! Sturdy with self-stick flaps. Excellent value!
Madison –
Great value!
Great, durable self seal envelop option! Theyāre super secure, not too thick & the adhesive sticks very well. This is our second box and we will definitely be repurchasing again because itās a great value!
Gey cengu –
Excelente calidad
PrĆ”cticos y cĆ³modo de utilizar
Mike E. –
These Colombian envelopes are strong, well-sealed, and perfect for everyday mailing needs. āļø The paper quality feels durable and secure, so I donāt worry about contents getting damaged. Easy to write on, and the adhesive sticks well. Great value for both personal and office use!
Kasia –
Peefect
Tilly –
Good envelopes!
KJ –
These are great envelopes! I mail alot of letters and the convenience of a self-adhesive envelope is undeniable, highly recommend.
Adrienne –
Super good quality!