Each envelope in this pack features a straight flap with a metal clasp closure, along with an optional gum closure for added reinforcement. In this pack, there an even total of 100 envelopes included! Each one features a sleek and sophisticated jet black color. The appearance of these envelopes makes them great for any home or office need! Because of their size, these envelopes are perfect for enclosing standard sized and slightly larger documents without creasing our folding. Use them to send documents, forms, files, and more! Details: Black 10" x 13" 100 envelopes Clasp and gum adhesive closure Open end 24lb. paper Smooth texture