---
product_id: 41083031
title: "100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes)"
brand: "blue summit supplies"
price: "₱6192"
currency: PHP
in_stock: true
reviews_count: 13
category: "Blue Summit Supplies"
url: https://www.desertcart.ph/products/41083031-100-9-x-12-self-seal-security-catalog-envelopes-designed
store_origin: PH
region: Philippines
---

# Holds up to 60 sheets 9x12 inch perfect fit Strong peel & seal flap 100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes)

**Brand:** blue summit supplies
**Price:** ₱6192
**Availability:** ✅ In Stock

## Summary

> 🔐 Seal your success with confidence and style!

## Quick Answers

- **What is this?** 100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) by blue summit supplies
- **How much does it cost?** ₱6192 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/41083031-100-9-x-12-self-seal-security-catalog-envelopes-designed)

## Best For

- blue summit supplies enthusiasts

## Why This Product

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

## Key Features

- • **Privacy First:** Security tint ensures sensitive info stays confidential during transit.
- • **Generous Capacity:** Fits up to 60 sheets, perfect for hefty reports or magazines.
- • **Time-Saving Design:** Wide opening speeds up stuffing, so you can focus on what matters.
- • **Effortless Security:** Peel & seal flap locks your documents tight—no spills, no stress.
- • **Durable & Professional:** Sturdy 28 LB white wove paper for a premium feel and reliable protection.

## Overview

These 9x12 inch self-seal security catalog envelopes from Blue Summit Supplies combine a strong peel-and-seal closure with a security tint and durable 28 LB paper, securely holding up to 60 sheets of standard letter paper. Ideal for professional use, they protect sensitive documents like tax and legal papers while offering a wide opening for quick, efficient packing. With 100 envelopes per pack, they’re a trusted choice for organized, confidential mailing.

## Description

Product description Other Catalog Envelopes from Blue Summit Supplies 6" x 9" Kraft 7" x 10" White 9" x 12" Kraft 10" x 15" White 11.5" x 14.5" Kraft 13" x 18" White

Review: Nice Envelopes At A Great Price - I needed envelopes that fit the size of the majority of sewing patterns. I am an online seller and price, quality, as well as fit is always important to me and these envelopes check all the boxes.
Review: Envelope is everything you'd expect and no more licking! - The envelopes measure exactly what's advertised, 6"x9". The weight is similar to any descent quality mail envelope. The peel and stick feature is great and the adhesive holds well. If it matters for your use, the inside has a security print pattern to protect privacy of contents from being easily seen. I use these as a cheaper alternative to package vegetable seeds at my store. The factory glued areas hold up to any amount of product I load and never leak from those spots. I have purchased many times and will continue to do so in the future.

## Features

- Perfect size for standard 8.5'' x 11'' letter paper, wide opening saves times when stuffing up to 60 sheets of letter paper securely
- Just Peel and Seal to create a strong lasting seal: No need to worry about your contents failing out during transit even when shipping hefty shipments like 60 sheets of paper or magazines
- Provides complete security: your documents are safe from others during transit. Safe for sensitive documents like tax, legal, and financial documents
- Securely holds hefty files during transit due to it sturdy construction and thick 28 LB White Wove Paper.
- Allows for organized storage of personal and company documents due to its large size and Security Tint. Great for storing receipts, monthly financials, tax returns, magazines, reports and more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N9XWRES |
| Additional Features | Self-Adhesive Closure |
| Best Sellers Rank | #11,671 in Office Products ( See Top 100 in Office Products ) #16 in Catalog Mailing Envelopes |
| Brand | Blue Summit Supplies |
| Brand Name | Blue Summit Supplies |
| Closure Type | Self-Seal |
| Color | Security Tint |
| Customer Reviews | 4.7 out of 5 stars 1,467 Reviews |
| Item Dimensions L x W | 12"L x 9"W |
| Item Shape | Rectangular |
| Item Weight | 4 Pounds |
| Manufacturer | Blue Summit Supplies |
| Material | Paper |
| Material Type | Paper |
| Number of Items | 100 |
| Occasion | Professional Use |
| Recommended Uses For Product | Security |
| Size | 9 x 12 |
| Style | Catalog |
| UPC | 865181000382 |
| Unit Count | 100.0 Count |

## Product Details

- **Brand:** Blue Summit Supplies
- **Closure Type:** Self-Seal
- **Color:** Security Tint
- **Material:** Paper
- **Occasion:** Professional Use

## Images

![100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) - Image 1](https://m.media-amazon.com/images/I/81ijlPO-tFL.jpg)
![100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) - Image 2](https://m.media-amazon.com/images/I/81YdQY4GACL.jpg)
![100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) - Image 3](https://m.media-amazon.com/images/I/71RJIOnEgaL.jpg)
![100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) - Image 4](https://m.media-amazon.com/images/I/81ep1hHmMjL.jpg)
![100 9 X 12 Self Seal Security Catalog Envelopes - Designed for Secure Mailing - Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap (100 Envelopes) - Image 5](https://m.media-amazon.com/images/I/71ANx6lo52L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Are these very sturdy and rip-resistant?  i'm looking for envelopes won't get shredded by the post office.  i want to avoid using tyvek.  thanks!**
A: These are sturdy, but they are not shred resistant and are definitely not on the same sturdiness as Tyvek. But I've shipped catalogs from U.S. to Canada via the Post Office, and one got returned back to me. The envelope still looked in good condition if that helps any.

**Q: Does anyone know if the envelopes come with the seal flaps up or down?  I know this is being picky, but they will not fit in my storage cabinet if up.**
A: They come in a box with the flaps down. You should be able to open the box up and take them out and add them to your cabinet! Hope that helps!

**Q: Can i send a 11*8.5 photo  using this letter? I'm worried that the photo may bend if the envelope is not made of hard board.**
A: This is a soft envelope.  You could put a piece of cardboard on each size and then use this envelope.

**Q: Does this bend easy?**
A: These are like any other regular envelopes and would bend if mishandled.  They have the kind of paper so you can't see important papers that are in the envelope.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice Envelopes At A Great Price
*by S***Q on February 19, 2026*

I needed envelopes that fit the size of the majority of sewing patterns. I am an online seller and price, quality, as well as fit is always important to me and these envelopes check all the boxes.

### ⭐⭐⭐⭐⭐ Envelope is everything you'd expect and no more licking!
*by B***G on November 4, 2024*

The envelopes measure exactly what's advertised, 6"x9". The weight is similar to any descent quality mail envelope. The peel and stick feature is great and the adhesive holds well. If it matters for your use, the inside has a security print pattern to protect privacy of contents from being easily seen. I use these as a cheaper alternative to package vegetable seeds at my store. The factory glued areas hold up to any amount of product I load and never leak from those spots. I have purchased many times and will continue to do so in the future.

### ⭐⭐⭐⭐⭐ Quality 11 x 14 Envelopes
*by S***9 on June 12, 2025*

Quality large envelopes at a low price. The envelopes have a thickness which provides confidentiality for enclosed documents. My purchase was actually for the 11x14 size which is large enough for letter or legal size documents. With it being so hard to find legal size envelopes in many local stores, the reasonable price, product availability and quick delivery are more reasons why I will be buying these envelopes again in the future.

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-05-28*