MailWraps Happy Holidays Cardinal Mail Box Cover 01054 This contains one all-weather vinyl MailWraps mailbox cover. Meets all U.S. Postal requirements and fits standard size mailboxes 6.5 inches by 19 inches. Attaches to metal mailboxes with magnetic strips. An adapter kit for plastic mailboxes is available and sold separately. High quality flexible vinyl. Made in the USA. Reusable. Change covers for each season.