Quality Park 6 x 9 Self Sealing Brown Kraft Catalog Envelopes, 28 lb, for Mailing, Storage and Organizing, 100 per Box (44162) 6 x 9 ENVELOPE SIZE: is the perfect size for mailing and storing folded sheet(s) of 8-1/2 x 11 paper, letters, photos, and other small items. 28 LB BROWN KRAFT STOCK: Manufactured from durable 28 lb. stock, the brown kraft paper will provide privacy of the contents. The durability of the heavy paper will withstand normal wear and tear of both storage and the postal service. REDI-STRIP SELF SEAL REMOVABLE STRIP: provides a clean, quick seal immediately upon contact. Simply peel off the adhesive strip to create a full, secure seal that won't open or tear. The self-seal peel-off strip protects the adhesive from dust for a longer shelf life. 100 ENVELOPES IN EACH BOX: ideal for both storage and mailings, each box of Quality Park 6 x 9 Catalog Envelopes with Redi-Strip self seal removable strip closure provides a long lasting supply and great value!