The product is a pack of 20 silver mailbox numbers, measuring 2.75 inches each and made of plastic. They are self-adhesive and can be mounted on the door for easy identification. The numbers come in both landscape and portrait orientation, making them versatile for any office space. With a brass color and a weight of 0.24 pounds, these mailbox numbers by Hopewan are a practical and stylish addition to any home or office.