MailWraps Mason Jar Bouquet Mailbox Cover #01094 Part of Magnet Works collection of matching flags, mailbox covers, and yard signs Attaches to metal mailboxes with magnetic strips. Adapter kit for non metal mailboxes sold separately. Fits standard size mailboxes 6"x19" Meets US Postal Requirements High quality flexible vinyl. Made in the USA. Reusable, change covers for each season