The 3 Piece Document Envelope is a well made Envelop Set. There are 3 envelopes included within each set. These envelopes are made with thick paper to prevent them being wrinkled easily. The Leather, Denim and Linen style are all printed to replicate the look of Leather, Denim, and Linen. It is spacious enough to hold A4, letter-sized papers so you can store important documents, resume and magazines inside. To seal the envelope you can use the attached double sided tape! Also, it also includes label stickers, so you can use them to label the envelopes!