Best Foldersys in 2026

PP cap Envelope/a4hoch with margin perforated case for clear/transparent

Manufacturer: Book

Manufacturer Number: 40106 04

Box of 100 windowless #10 security envelopes with a Redi-Strip peel and seal closure

Security envelopes have a special security tint pattern that obscures what's inside; ideal when you're sending more sensitive material through the mail

Self seal envelopes are quick, easy and more clean and sanitary than gummed envelopes; with a Redi-Strip closure, just peel off the strip and press closed for a secure seal; no moisture needed

#10 business letter envelopes for personal or professional use

Includes 500 #10 envelopes made of 24-pound standard white woven paper for quality and strength; no tint

Moisture activated gummed closure ensures a secure seal

300-Pack of #6 envelopes with Peel & Seal closure—no moisture needed

Ideal for home or office; securely send checks, invoices, or other confidential documents

Interior security tint keeps content private

100-Pack of 6 envelopes with Peel & Seal closure—no moisture needed

Ideal for home or office; securely send checks, invoices, or other confidential documents

Interior security tint keeps content private; windowless design

100-Pack of 6 x 9 inch catalog envelopes

Durable 28-pound brown kraft material provides privacy and strength

Easy-to-seal Peel and Seal closure—no moisture needed

Mead press it seal it number 10 security envelopes, 45 envelopes per box

White envelopes with self adhesive seal, Security lining for privacy

Size: 4 to 1/8 inches x 9 to 1/2 inches

A4+ POPPER WALLETS: Pack of 5 durable plastic folders with a smart white press-stud closure on the curved flap for keeping documents organised and secure

LARGE CAPACITY: Capable of storing 150 sheets of 80gsm paper and large A4+ / foolscap size allows for storing C4 envelopes (designed for A4 sheets)

EASY ORGANISATION: A4+ popper wallets made from crystal-clear, transparent polypropylene allowing for quick and easy identification of documents inside the folder, with a quality ‘Superline’ finish

SHOWCASE BRANDING. Promote your brand and project a professional image of your company through our highly customizable envelopes.

ELEGANT AND SMOOTH FINISH. It is perfect for simple correspondences, like friendship or love letters, to more complex ones - invoices, invitations, statement of account, certificates, brochure, fliers, and other business documents.

VERSATILE. This can be useful for organizing home paperworks and small craft supplies as well like to-do lists, budget, receipts, coupons, stamps, stickers, paper scraps, etc.

500 PACK SELF SEAL BUSSINESS ENVELOPES：HERKKA #10 Security envelopes are designed with Peel & Seal closure—no moisture needed and a premium security tint to protect sensitive information and a super strong SELF-SEAL strip.perfect for home or office; securely send checks, invoices, or other confidential documents.

PREMIUM SECURITY TINT PATTERN: The interior of our #10 Security envelopes use a dark navy, heavy coverage security tint to provide guaranteed privacy for your legal or business mail, offer the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy.

PERFECT FOR CHECK PRINTING DESIGN: HERKKA envelopes ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office. Perfect for quick, mass business mailings.

Package contains 30 clear folders, A4 size.

Quality assurance: made of high quality plastic, clear and bright surface, thick and durable, non-toxic and odorless, with professional quality.

Super large capacity: can store up to 200 sheets of A4 paper per folder.

Country Of Origin : United States

Heavy 24Lb White Paper - Made In Usa

Package Weight : 6.1 Lbs

Colorful Transparent Envelopes & Large Capacity: 5 assorted colors: transparent blue, green, yellow, purple, and pink (each color with 2). It’s easy to organize and distinguish your paper with a different color. The envelope folder size is 13.25 x 9.25 inches

Premium Quality & Thickness Upgraded: Durable PP material plastic envelope folders

Design with Snap Button & Label Pocket: High-quality clear document bag with snap button perfect for US letter / A4 size paper and other small items storage. Plastic Envelopes have a pocket for labels to distinguish documents easily

Color: Black

Size: Letter (9.75 x 1.25 x 13 inches)

Quantity: 12 per pack

Color: Fuchsia Pink

Size: #10 (5.25 x 10 inches)

Quantity: 12 per pack

Perfectly fits QuickBooks Laser Checks, or other computer printed checks: checks will slide in easier with a slightly wider design than the standard two window 8 5/8 envelope

Checks amounts and memos will not be visible: Only addresses will show through our unique 2 window design with no need to change QuickBooks, QB Online, or Quicken settings

Provides complete check security: your checks will be hidden with our security tint design

💌 Color: Sage Green Envelopes, 120gsm good quality paper.

💌 Size: 5.3 x 7.4'' about 135 mm x 195 mm. (Fit for 5x7'' invitation cards, and fit for each invitations kits in our store )

💌 Package included: 50 pieces Sage Green luxury envelopes + 50 Gold Seals. (Envelopes can be sealed by the moistenable glue strip on the back flap)

Color: Clear

Size: Letter (9.75 x 1.25 x 13 inches)

Quantity: 12 per pack

Color: Lime Green

Size: 5.5 x 7.5 inches

Quantity: 12 per pack

SAVE TIME WITH SELF-STICK: Quality Park 6 3/4 Security Envelopes have a strong peel & stick closure that helps you fly through mailings in record time

ENHANCED SECURITY: Offer the protection clients deserve & protect yourself from liability; a security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text

LESS YUCK: We promise you won't miss licking envelopes or crumbly, drippy sponges; complete your mailings, no accessories required

#6 3/4 SECURITY TINTED SELF SEAL ENVELOPES; want the very best in secure, security-tinted envelopes with a super strong self-seal? Aimoh's No. 6 3/4 Security Envelopes combine durable, printer-compatible paper, a security tinted design and strong self-seal QUICK-SEAL for the best #6 3/4 security self-seal envelopes on the market

SUPER SECURITY TINT PATTERN; #6 3 / 4 envelopes designed with a secure, security tint-pattern to protect contents and sensitive information, perfect for ultra-secure personal mailing while protecting sensitive information

300 ENVELOPE PACK; these envelopes are manufactured with a WINDOW-LESS front panel for the perfect choice for Personal Checks, home offices and everyday use, No. 6 3/4 Security Envelopes are provided in a 300-envelope pack

Color: Black

Size: #10 (5.25 x 10 inches)

Quantity: 12 per pack

PACKAGE INCLUDES: 28pcs 8-color A4 size transparent poly folders with snap button closure.

SIZE AND COLOR: The plastic folders is 33.3 x 23.6 cm / 13.1 x 9.3 inches. There are 8 kinds of bright colors: blue, green, purple, orange, white, dark blue, yellow, red, different color folders can help organize different types of files.

SIMPLE AND STYLISH: translucent plastic folders, in rich colors,waterproof and reusable. Classic look, simple and stylish. Suitable for tracking different topics for easy sorting and searching.

Perfectly fits QuickBooks Checks, or other computer printed checks: checks will slide in easier with a slightly wider design than a standard 8 5/8 envelope

Checks amounts and memos will not be visible: Only addresses will show through our unique double window design with no need to change QuickBooks settings

Provides complete check security: your checks will be hidden with our security tint design

Color: Fuchsia Pink

Size: Index / Check (5.5 x 7.5 inches)

Quantity: 12 per pack

Our #10 light blue envelopes are the ideal choice for mailing letters, gift certificates, and cards

Use stickers, markers, and labels to easily customize these colorful blank business envelopes

The cash envelopes feature high-quality paper and a square flap to keep your contents secure

Large Capacity: 100% clear plastic envelopes for easy organization and separation of papers. The size of the envelope folder is 13 x 9 inches (33.3cm * 23.5cm), and can hold on more than 200 sheets of letter size paper.

High-quality & Waterproof: Durable PP material plastic and waterproof envelope folder with upgraded thickness to prevent tearing for durable using and holding your documents or other items safe.

Design with Snap Closure and Label Pocket: High-quality translucent document bag with snap closure, easy and convenient to take and store lightweight things, and durable to last long after multiple repeats. Plastic Envelopes have a pocket for labels to distinguish documents easily.

Package Includes 10 Plastic Envelopes In 5 Assorted Colors: Transparent, Blue, Green, Yellow, And Pink (Two Of Each Color)

The Envelope Folder Size Is 13.25 X 9.25 Inches. Both A4 And Letter Sized Files Can Be Stored.

Plastic Envelopes Have A Pocket For Labels To Distinguish Documents Easily

Set of 12, 6 colors, 2 for each color. The envelope size is 9.4'' × 4.7'', perfect for A6 sheets and other small items. Best way to keep your items organized and help you sort the clutter, cash envelope system, budget project, school supplies, art supplies, receipts, bills, coupons, photos, stationery, and other small things, but also work as pencil bags.

Premium quality for safe organizing: Made from durable sturdy poly, the acid-free small poly envelopes resist wear, tear, and moisture. Thicker design, single-layer thickness is increased to 0.18mm, perfect for keeping your items safe and organized.

Classify and identify your document easily: Outside mini label pocket helps classify and identify your document easily. Easy to organize and distinguish your paper with 6 assorted bright colors.

500 standard-size security-tinted #9 double window envelopes

Ideal for 8.5-by-11-inch computer-generated invoices and statements

Double windows 3/8-inch from the left to show sender info (2 inches from bottom) and recipient info (1/2 inch from bottom)