Made to fit large, steel mailboxes measuring 8W x 21L. Our mailbox covers easily attach to steel mailboxes using magnetic strips on each side. Our original artwork printed on material designed for outdoor display provides unique designs that are as durable as they are beautiful! With designs for every holiday, theme, and season Briarwood Lane is sure to offer the perfect decorative accent! Each mailbox cover has optional punch-out holes and includes plastic straps for additional security against theft/extreme weather. Also includes 3 sets of adhesive numbers.