●Strong self seal closure to offer a strong sealing and keep the inside documents safe. ●The windowless design for easy printing, labeling or hand-addressing, great for quick, mass business mailings. ●The #10 envelopes are designed with a premium security printed design to protect contents and sensitive information. Specification: Material: Kraft paper Color: Brown Closure: Self seal Size: 4-1/8 x 9-1/2 inches