Quality Park 10 x 13 Catalog Envelopes with Self Seal Closure, 28 lb Brown Kraft, Great Option for Mailing, Storage and Organizing, 100 per Box (44762) MULTI-USE: Quality Park's 10 x 13 catalog envelopes are the perfect size for holding 8-1/2 x 11 documents, photos and catalogs. They are great for mailing, storage and keeping things organized in both home and office environments. BROWN KRAFT 28 LB STOCK: Perfect for everyday home and business use, Quality Park's catalog envelopes are constructed from heavyweight 28 lb. brown kraft stock designed to give contents extra protection during mailing, storage and handling. 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. 10 x 13 SIZE: Perfect size for mailing and storing 8-1/2 x 11 sized documents flat when folding is undesirable. PACKED IN 100 COUNT: So many uses means supply is depleted quickly! Conveniently packed in 100 count to reduce frequency of purchasing.