---
product_id: 6179869
title: "#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8\" x 8 7/8\" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain"
brand: "endoc"
price: "$41.16"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/6179869-9-security-tinted-envelopes-100-pack-letter-size-3-7
store_origin: US
region: United States of America
---

# #9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain

**Brand:** endoc
**Price:** $41.16
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** #9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain by endoc
- **How much does it cost?** $41.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/6179869-9-security-tinted-envelopes-100-pack-letter-size-3-7)

## Best For

- endoc enthusiasts

## Why This Product

- Trusted endoc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain

## Images

![#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain - Image 1](https://m.media-amazon.com/images/I/81UFOgwccAL.jpg)
![#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain - Image 2](https://m.media-amazon.com/images/I/819azvmkG1L.jpg)
![#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain - Image 3](https://m.media-amazon.com/images/I/61QNl4TSx8L.jpg)
![#9 Security Tinted Envelopes - 100 Pack - Letter Size 3 7/8" x 8 7/8" - Gummed Seal for Business, Return Mailing, Legal, Checks, Invoices, Statements - 24lb Plain - Image 4](https://m.media-amazon.com/images/I/71U58HXPi0L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Perfect for Businesses and Sending SASEs
  

*by Y***S on Reviewed in the United States 🇺🇸 on March 11, 2016*

Do you know how hard it is to find #9 envelopes at a brick-and-mortar store that doesn't come in a box of 500? And, if you do find a box of them, they tend to have the see-through window on them. I went to several different office supply retailers (and similar stores) to purchase #9 envelopes and could not find a box count and price that fit my budget. CheckOMatic came to the rescue by selling a box count that I could work with, and for a price that wouldn't break the bank.The envelopes shipped quickly and are packaged in a sturdy cardboard box with an easy flip lid.I am also pleased with the quality of the envelopes. The #9s are not flimsy and offer sturdy construction. They are made with dark tinted security, which means that your private information is kept safe. I use them when a SASE (self-addressed stamped envelope) is required.  You stick a #9 inside of a #10 envelope (the standard business-sized envelope size sold everywhere), and you don't have to worry about awkwardly folding an envelope to make it fit. The envelopes would also definitely make a solid addition to a business office. I'm very pleased to have found something to meet my needs.

### ⭐⭐⭐⭐⭐ 







  
  
    Exactly what I expected, flexible use
  

*by M***H on Reviewed in the United States 🇺🇸 on September 20, 2020*

I bought these to be printed return envelopes inside number 10 envelopes. They happen to be the same opaque interior as my number 10. The package size is more than I really wanted to buy,, but for ordinary mailing they can be used as a substitute for a number 10s and go through the printer the same way.

### ⭐⭐⭐⭐⭐ 







  
  
    Your life with loose-fitting #10 envelopes is OVER.
  

*by S***G on Reviewed in the United States 🇺🇸 on March 4, 2016*

Your life with #10 envelopes is OVER. Do you even know why you have been buying #10 envelopes your entire adult life? Neither did I, until I tried #9 envelopes. #9 envelopes actually fit a 3-folded piece of 8 1/2" x 11" piece of paper PERFECTLY. No sliding around inside the envelope, no extra space. Just snug and secure. A bonus feature of a #9 envelope is that it fits inside a #10 envelope, so you can easily send a return envelope without having to fold it. Genius. These envelopes come in a nice thick corrugated cardboard box with attached folding lid.

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**Shop now:** [https://www.desertcart.us/products/6179869-9-security-tinted-envelopes-100-pack-letter-size-3-7](https://www.desertcart.us/products/6179869-9-security-tinted-envelopes-100-pack-letter-size-3-7)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-21*