Professional Business Size: Standard #9 envelope (3 7/8" x 8 7/8") perfectly fits invoices, statements, checks, and everyday business correspondence for efficient mailing. Confidential Security Tint: Interior security pattern protects sensitive information and keeps contents private during transit and handling. Durable 24lb Paper: Constructed from sturdy white wove paper that withstands daily mailing, handling, and postal processing without tearing or damage. Gummed Flap Seal: Moisture-activated adhesive provides a secure, reliable seal for important documents, ensuring contents remain protected. Bulk Supply of 500: Ideal for offices, schools, and home use, keeping you well-stocked for all daily mailing and correspondence needs. These professional #9 business envelopes are designed to handle your everyday mailing needs with confidence. Measuring 3 7/8" x 8 7/8", they're perfectly sized to accommodate invoices, statements, checks, and standard business correspondence without folding or cramping your documents. The interior features a security tint pattern that shields sensitive information from prying eyes, making them ideal for financial documents and confidential communications. Constructed from sturdy 24lb white wove paper, these envelopes are built to withstand the rigors of daily handling and postal processing. The moisture-activated gummed flap provides a secure, reliable seal that keeps your important documents protected during transit. This bulk supply of 500 envelopes ensures you'll stay well-stocked for all your business, office, school, or home mailing requirements, eliminating frequent reordering and keeping your operations running smoothly.