- This Mailbox Numbers Decal comes with 1 Address Sticker - Up to 2” high x up to 5” wide, depending on font and address length. - 5 CHARACTER LIMIT **Please include the numbers and street name in the Personalization Box ** 5 CHARACTER LIMIT ** The Mailbox Address Decal is a custom made with your house number, making it easy for mail carriers and visitors to find your address. It's a perfect way to make your mailbox stand out and make sure your address is visible to everyone. Our outdoor grade vinyl is designed to stand up to harsh weather and car washes for years. Available in 12 colors.