Columbian #10 Security Envelopes, 500 Pack, White Self-Seal, No Window, 24 lb Paper

Columbian #10 Security Envelopes are a 500-pack of self-seal envelopes for everyday home, school, and business mail, made from 24 lb white wove paper.

• 4-1/8 x 9-1/2 inches (10.48 x 24.13 cm) — a standard #10 size for everyday mailing.
• Blue security tint with an interior safety pattern — helps block visibility into the envelope, even when held up to light.
• Peel-and-press adhesive — closes without licking or using a wet sponge.
• Plain front with no window — accommodates different types of mailed documents and materials.
• Useful beyond mailing — can organize cash budgets, spending categories, and savings funds.

These envelopes are made for regular correspondence when you want a practical format for documents and a closure that does not require moisture. Use them at home, in a school office, or in a business mailroom for routine outgoing mail and paper organization.

What can these Columbian envelopes hold?

They fit standard 8-1/2 x 11-inch sheets (21.59 x 27.94 cm) folded into thirds. The envelope’s 4-1/8 x 9-1/2-inch (10.48 x 24.13 cm) format suits letter-sized business documents prepared for mailing.

The white wove paper and side seams create a plain, windowless envelope for a range of mailing needs.

• Send business letters and forms.
• Mail invoices, statements, and checks.
• Use the plain front for marketing materials.

How do the security and self-seal features work?

A blue security tint and interior safety pattern help prevent the contents from being seen through the paper. This added privacy is useful for everyday mail that contains information you do not want visible during handling.

To close an envelope, peel the release strip and press the adhesive flap down. The moisture-free closure avoids licking or wet sponges and can help keep hands, desks, and mailroom work areas clean.

• Security pattern is designed to block visibility even when held up to light.
• Press-to-close adhesive keeps the sealing step simple.

Can they be used for organizing cash at home?

Yes. These envelopes can serve as cash budgeting envelopes for organizing spending categories, sinking funds, or savings systems at home or in a small office.

The plain, no-window front provides a simple place to keep budget categories organized. Their mailing format also makes them useful when you need one envelope style for both routine mail and paper-based organization.

• Sort cash by spending category.
• Set aside funds for savings goals or planned expenses.

Columbian #10 Security Envelopes suit households, schools, and small businesses that send regular paper correspondence or want envelopes for cash-budget organization. Their folded-letter fit, privacy-focused interior, and peel-and-press closure bring practical features together in one everyday mailing format.