JAM Paper recycled #9 envelopes are made out of high quality, 30% recycled, 28lb. paper. This pack contains a total of 50 envelopes. Each one features a bright and vibrant color that stands out from the rest of the mail! To keep mailed items secure, these envelopes have commercial style flaps and reliable gum closures. Use them to send letters, documents, checks, bills, invoices, notices, announcements, and more. The vivid color of these envelopes makes them ideal for promotions and for items that need to draw immediate attention! Use them for home and office purposes.Details:Available in multiple colors3.875" x 8.875" (size #9)50 envelopes30% recycled, 28 lb. paper