The single window design eliminates the need to print or handwrite addresses. In our #10 window envelopes, the large, easy-to-read poly window is positioned perfectly for displaying addresses or business information. These self-sealing windowed envelopes measure 4 1/8" x 9 1/2" inches and are designed to save you time and money, allowing you to fly through mailings in record time. They provide a secure solution—just peel and seal to create a strong, lasting seal without the need for moistening. Our self-seal design is quick and easy, and it is guaranteed to stay sealed without requiring tape or glue sticks. Crafted from durable 24lb paper, these standard white envelopes are perfect for everyday business use and feature a security tint designed to protect contents and sensitive information. Additionally, these envelopes can easily accommodate invoices, letters, checks, gift cards, and more, making them versatile for virtually any need. Each box includes 500 envelopes. Recommended age 14+ years