Large Magnetic Mailbox Covers sorted by holidays, making it easier for you to pick the right design for the right holiday. May it be 4th of July, Christmas, Easter, Halloween, Mardi Gras, Memorial Day, Mother's Day, St. Patrick's Day, Thanksgiving, Valentine's Day, Father's Day, Hanukkah or New Year, we have them organized for easy shopping. Flagsrus offers high quality, large magnetic mailbox covers from Magnet Works (Studio M). Add a splash of color with a vinyl weather resistant mailbox cover! All covers feature a slot for the postal carrier alert flag. These covers attach to the mailbox with magnets. The large size fits 8" x 21" mailboxes. No worry if you have a plastic or aluminium box, see the Adapter Kit.