SIZE : 8.5in D x 2.5in W x 0.3in HINNOVATIVE WALL-MOUNT MAILBOX FLAG : Exclusively designed for vertical mailboxes and wall-mounted mailboxes, featuring a patented folding flag design that adjusts to the shape of mailbox lids.DURABLE AND WEATHERPROOF : Crafted from heavy-duty plastic to withstand snow, rain, wind, and sun. This weather-resistant mailbox flag is built for long-lasting use in all outdoor conditions.WASIEST INSTALLATION : Pre-peeled adhesive corner for quick and simple application. Just peel and stick to any flat, smooth surface. Note: Not suitable for rough or uneven surfaces like stone. Alternatively, use the included screws for secure mounting.