Quality Park 9x12 gummed envelopes serve double duty for sorting or mailing. Fully gummed flaps provide a secure seal to keep contents secured; great for home, office, school These sturdy large envelopes are manufactured from heavyweight envelope stock for extra protection in mailing, storage and handling. These 9 x 12 envelopes are perfect for holding documents flat for when folding is undesired Gummed seal envelopes have a thick strip of adhesive activated by moisture; use an envelope moistener for a strong, sanitary seal; Great for mailing, storage, and organizing in both home and office environments 9 x 12 mailing envelopes are perfect for sending large lay-flat items without folds or creases; perfect for contracts, catalogs, registration packets, 8 x 10 photos and more An excellent value; get 250 classic white 9x12 envelopes at a stock-up price