The product is a set of 200 vellum finish business envelopes with a square flap, measuring 4 1/8 x 9 1/2 inches. These envelopes are designed for professional use in business settings, or home project mailings, providing a secure and elegant way to send important documents and materials. The vellum finish adds a touch of sophistication to the envelope, making it a great choice for sending formal correspondence or promotional materials. The square flap ensures a secure closure and easy sealing for reliable delivery.