Designed for efficiency and security, these #10 self-seal single window envelopes are perfect for everyday business or personal use. Measuring 4 1/8" x 9 1/2", they easily accommodate standard documents such as invoices, letters, checks, and gift cards. Each envelope features a large, easy-to-read poly window that clearly displays recipient addresses—eliminating the need for manual labeling. Crafted from durable 24lb white paper with a security tint lining, they protect sensitive information from view during transit. The self-sealing closure provides a hassle-free experience—just peel and seal for a strong, reliable hold without the mess of glue or moisture.