Quick, no-drill installation — see step-by-step instructions below.

Install Instructions

Find the Perfect Mailbox Flag

Every 321Engrave mailbox flag is manufactured from premium ASA plastic for years of outdoor durability and includes industrial double-sided adhesive and mounting hardware. The only difference is the design, so choose the one that best fits your home and personal style.

Design Best For
MAIL A clean, timeless design that looks great on virtually any mailbox.
US MAIL A classic USPS-inspired look with traditional mailbox styling.
Sleek US MAIL A modern, minimalist design with a refined appearance.
Solid Red The traditional red mailbox flag everyone recognizes.
Black MAIL Our incognito version that blends into black mailboxes without drawing attention to your outgoing mail.
Flag + MAIL Patriotic styling with bold MAIL lettering for maximum visibility.
Tattered Flag A rugged distressed American flag design with patriotic character.
Texas Star Perfect for Texans who want to show a little Lone Star pride.
Personalized House Number Customize your mailbox flag with your house number for added convenience and curb appeal.
Mix & Match Create your own unique mailbox flag by combining your favorite design elements.

View All Mailbox Flags