White envelopes are good for mailing out sales letter, brochures, annual reports, product literature and other materials. Opens on the short side for paper insertion. A cost-effective envelope that gets the job done. Heavily gummed for a secure seal.GUMMED: Fully gummed flaps provide a secure seal to keep contents secured.MULTI:PURPOSE: These 9″ x 12″ envelopes are perfect for holding documents flat for when folding is undesired.VERSATILE: Great for mailing, storage, and organizing in both home and office environments.EASE: Envelope opens on the short top side for easy insertion and retrieval of contents.GREAT VALUE: Conveniently packed in 250 count to reduce the frequency of repurchasing.PAPER QUALITY: Sturdy 24# White Paper Stock.