Top 10 9×12 Mailing Envelopes – Clasp Mailing Envelopes

As an Amazon Associate I earn from qualifying purchases.

1. Quality Park

#ad

100 per Box 37890, Quality Park 9 x 12 Clasp Envelopes with Deeply Gummed Flaps, 28 lb Brown Kraft, Great for Filing, Storing or Mailing Documents

#ad
Quality Park #ad - Brown kraft 28 lb stock: perfect for everyday home and business use, Quality Park's clasp envelopes are constructed from heavyweight 28 lb. Packed in 100 count: so many uses means supply is depleted quickly! Conveniently packed in 100 count to reduce frequency of purchasing.

Reusable clasp: designed for repeated use, double prong metal clasp is durable and eyelets are reinforced. Great for home, office, school, interoffice or mailing. Brown kraft stock designed to give contents extra protection during mailing, storage and handling. Gummed flap: in addition to the clasp closure, these quality park envelopes have a moisture activated secure seal with deep Gumming on the flap to create a permanent seal.

The flaps close with full flap gum to endure humid climates to ensure the envelope stays sealed so your contents don't fall out! 9 x 12 size: perfect size for mailing and storing 8-1/2 x 11 sized documents flat when folding is undesirable.
BrandQuality Park #ad
ManufacturerQuality Park #ad
Height3.75 Inches
Length14 Inches
Weight4 Pounds
Width9.1 Inches
Part NumberQUA37890
Model37890

2. Amazon Basics

#ad

100-Pack, 9x12 Inch, Peel & Seal, White, Amazon Basics Catalog Mailing Envelopes

#ad
Amazon Basics #ad - Measures 9 by 12 inches each. Ideal for mailing catalogs, brochures, booklets, and multi-page documents.100-pack of #10-1/2 catalog envelopes. Easy-to-seal peel & Seal closure—no moisture needed. Durable 28-pound white woven paper for quality and strength.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZP15
ModelAMZP15

3. Amazon Basics

#ad

AMZP13, Amazon Basics Catalog Mailing Envelopes, Brown Kraft, 9x12 Inch, Peel & Seal, 100-Pack

#ad
Amazon Basics #ad - Measures 9 by 12 inches each. Ideal for mailing catalogs, brochures, booklets, and multi-page documents. Durable 28-pound brown kraft material provides privacy and strength. Easy-to-seal peel & Seal closure—no moisture needed. 100-pack of 9 x 12 inch catalog envelopes.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZP13
ModelAMZP13

4. Quality Park

#ad

Quality Park 9" x 12" Self-Seal Catalog Envelopes, Organizing and Storage, for Mailing, Heavy 28-lb Paper, 100 Per Box QUA44562, Brown Kraft

#ad
Quality Park #ad - Quality park 9" x 12" self-seal catalog envelopes, organizing and Storage, Heavy 28-lb Paper, for mailing, Brown Kraft, 100 Per Box QUA44562.
BrandQuality Park #ad
Manufacturer0 #ad
Height2.9 Inches
Length12.2 Inches
Weight1 Pounds
Width9.4 Inches
Part Number44562
Model44562

5. UCGOU

#ad

UCGOU 9x12 Inch 200Pcs Purple Poly Mailers Premium Shipping Envelopes Mailer Self Sealed Mailing Bags with Waterproof and Tear-proof Postal Bags

#ad
UCGOU #ad - If you are shipping anything which is breakable, we would recommend UCGOU bubble envelopes. Lower the shipping cost of your business and protect your products on the rainy or snowy day. 100% satisfaction Guaranteed.

Tear resistance self sealing envelopes. Eye catching. If there are any quality problems, just let us know for a refund or replacement. There's no need reinforcement tape and it doesn't come apart unless you tear it up. Ucgou purple is highly attractive color which makes your products look better than standard white shipping envelopes and it helps customize your brand! Premium quality envelopes have a good stretch, lightweight and water-resistant.

The adhesive on the fold-over flap is really strong and tamper-evident. Only for non-fragile items. The shipping envelopes are perfect for sending clothes and other small soft presents. If you are tired of plain regular mailers, our designer poly maileRS are a choice for you.
BrandUCGOU #ad
ManufacturerUCGOU #ad
Part NumberAZ114

6. ValBox

#ad

ValBox 9x12 Self Seal Catalog Envelopes 250 Packs White Envelopes with Peel and Seal Flap for Mailing, Organizing and Storage

#ad
ValBox #ad - You don't need to worry about the contents in the white catalog mailing envelopes falling out during transit even you have put hefty 60 sheets of paper or magazines. Peel & seal, no licking this self seal catalog envelopes are easy to peel and seal with a strong flap adhesive, no licking of glue or water to moisten when working with multiple mailings.

Provides complete security adhesive on valbox 9x12" security catalog envelopes creates a strong lasting seal. 9 x 12 inches, business documents, contracts, photographs, 250 packs coming with a nice storage box, ValBox white catalog envelopes are 250pcs/packs.99 x 12 inch self sealing envelopes is perfect for standard letter size papers, magazines and more without folding. A replacement or 100% refund will be immediately provided to you.

It's not easy to see through the contents because of the thicken paper. Keep your item safe and protect your privacy. Money back guaranteewe are confident you would love our valbox white catalog envelopes in its quality and price. Good job in saving time. However, if there's anything make you unhappy or unsatisfied, please do contact us without any hesitation. Otherwise, you can also run these through your laser or inkjet printers without bleeding ink out or going ink fuzzy.
BrandValBox #ad
ManufacturerValBox #ad
Part NumberVB026

7. Blue Summit Supplies

#ad

Oversize Strong Peel and Seal Flap with 28 Pound Kraft Paper- 100 Envelopes, 100 9 X 12 Self Seal Golden Brown Kraft Catalog Envelopes, Designed for Secure Mailing

#ad
Blue Summit Supplies #ad - Allows for organized storage of personal and company documents due to its large size. Securely holds hefty files during transit due to it sturdy construction and thick 28 LB Kraft Paper.

Safe for sensitive documents like tax, legal, and financial documents. Perfect size for standard 8. 5’’ x 11’’ letter paper, wide opening saves times when stuffing up to 60 sheets of letter paper securely. Great for storing receipts, tax returns, monthly financials, magazines, reports and more. Provides complete security: your documents are safe from others during transit. 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.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-014

8. Blue Summit Supplies

#ad

100 9 X 12 Self Seal Security Catalog Envelopes, Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap 100 Envelopes, Designed for Secure Mailing

#ad
Blue Summit Supplies #ad - Allows for organized storage of personal and company documents due to its large size and Security Tint. Safe for sensitive documents like tax, legal, and financial documents.

Perfect size for standard 8. 5'' x 11'' letter paper, wide opening saves times when stuffing up to 60 sheets of letter paper securely. Securely holds hefty files during transit due to it sturdy construction and thick 28 LB White Wove Paper. 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. Great for storing receipts, tax returns, monthly financials, magazines, reports and more. Provides complete security: your documents are safe from others during transit.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight3.97 Pounds
Part NumberBSS-92588-010

9. Quality Park

#ad

Quality Park 9 x 12 Clasp Envelopes with Deeply Gummed Flaps, 250 per Box 37590, Great for Filing, Storing or Mailing Documents, 28 lb Brown Kraft

#ad
Quality Park #ad - Great for home, interoffice or mailing. Packed in 250 count: so many uses means supply is depleted quickly! Conveniently packed in 250 count to reduce frequency of purchasing. Brown kraft 28 lb stock: perfect for everyday home and business use, Quality Park's clasp envelopes are constructed from heavyweight 28 lb.

Brown kraft stock designed to give contents extra protection during mailing, storage and handling. Gummed flap: in addition to the clasp closure, these quality park envelopes have a moisture activated secure seal with deep Gumming on the flap to create a permanent seal.

Reusable clasp: designed for repeated use, school, office, double prong metal clasp is durable and eyelets are reinforced . The flaps close with full flap gum to endure humid climates to ensure the envelope stays sealed so your contents don't fall out! 9 x 12 size: perfect size for mailing and storing 8-1/2 x 11 sized documents flat when folding is undesirable.
BrandQuality Park #ad
Manufacturer0 #ad
Height9.75 Inches
Length14.31 Inches
Weight0.06 Pounds
Width9.06 Inches
Part Number37590
Model37590

10. Aimoh

#ad

28lb, Security Tinted, 9 x 12 inch 38100, Ultra Strong Quick-Seal, 100 9 x 12 SELF Seal Security White Catalog Envelopes

#ad
Aimoh #ad - 100 9 x 12 catalog envelopes in every pack for a long lasting supply, easy bulk mailing and everyday business correspondence! Security tint pattern; ideal for secure business mailing and sensitive correspondence, each 9x12 envelope contains a super secure, security tint pattern to protect contents, information and data when mailing.

9x12 catalog envelopes; aimoh’s white 9x12 security envelopes combine a professional security tint pattern, large size for business documents and premium quality for the best 9x12 envelopes on the market. For 8. 5x11 documents; large 9x12 size and strong quick-seal closure security tinted envelopes, perfect for photos, catalogs, thicker, larger documents and other business mailings.

White 28lb stock; perfect for everyday business use, aimoh’s 9x12 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear and use high quality, white 28lb stock for a professional finish.
BrandAimoh #ad
Height2.5 Inches
Length9 Inches
Weight4.06 Pounds
Width12 Inches
Part NumberFBA_38100
ModelFBA_38100