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We Make Replacement Mailbox FlagsThat Peel & Stick in Seconds!

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First Class Materials

Your replacement PostFlag is made with premium, outdoor rated materials. Our metal flag is crafted with rust-proof, powder coated aluminum & features revolutionary 3M™ VHB™ (Very High Bond) tape. Our magnetic mailbox flags are created with heavy duty PVC rubber. Your PostFlag is 100% guaranteed to work from -20°F to 120°F


ZERO Tools Required

Thank you for considering our replacement mailbox flag options. Absolutely ZERO tools required! All models installs in SECONDS, & last the lifetime of your mailbox. Save yourself time & frustration by working smarter, not harder. Every PostFlag product is thoughtfully designed for different mailbox styles & materials.


Safe & Secure Adhesive

Safely & securely sticks to smooth surface wood, metal, plastic, rubber, stone, cement & brick/paver. *Do NOT use on gritty or flaky mailbox surfaces. If it does not work for you, send it back to us for a FULL refund. The peel/stick version of our product line is the original and best selling model. It is guaranteed to last the lifetime of your mailbox.

Step 1. Wipe Surface

For best results, wipe the surface of your mailbox clean of dirt & debris before applying your new mailbox flag.

Step 2. Peel, Stick & Hold

Absolutely ZERO tools required! Peel, stick & hold for 10 seconds to complete the installation process!

Step 3. Raise Your Flag

Don't forget to raise your new mailbox flag! Without a raised flag, the postal service cannot collect your outgoing mail.


Front Side


Peel 3M™ VHB™


Back Side

Step 4 PostFlag

Stick To Mailbox

Hold 10 Seconds

ZERO Tools Required

We spent 9 months engineering the world's first peel & stick replacement mailbox flag to help people with zero tools fix their mailbox. Unlike the hardware stores, we know that everyone does not have the ability or skills to use tools.
We have not yet discovered any climate the PostFlag does not work. Buy with Confidence!

What our customers say

Works great for my wall mounted mail box. Ideal size.

Postflag review 2
Jacob Amazon Customer

Strong and Durable!!! Looooove! After reading about similar products, I chose this one because it was fully rubber and did not have a paper layer.

Postflag review 4
Jeremy Amazon Customer

I can't imagine a better buy. This was so easy. Thanks so much for this product. Really made my day!

Postflag review 1
Stephanie Amazon Customer

This stick on flag was exactly what I was looking for. Very easy to install. I bought it to use on a group mailbox where I work.

Postflag review 3
Diane Postflag Customer

Perfect Solution! When my mailbox was plowed over during a heavy New England blizzard, I thought I would have to pay for a new mailbox until I found this magnetic post flag replacement online. Perfect solution without the added costs.

Postflag review 5
JC Neel Postflag Customer
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