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Unisex tee · XS–3XL
$39.99
Hover to zoomTwelve Words Never Share Them Bitcoin T-Shirt
$39.99
An orange closed notebook over TWELVE WORDS. and NEVER SHARE THEM., with a small Bitcoin symbol: a firm, friendly rule for anyone who keeps a recovery phrase.
- Unisex tailored fit, sizes XS–3XL
- Free US shipping over $75, $4.99 below
- 30-day size exchanges on unworn tees
About this design
A closed orange outline notebook with an elastic strap wrapped around it sits above TWELVE WORDS. and NEVER SHARE THEM. in two lines of bold white capitals. A small tilted orange Bitcoin symbol sits centered under the words.
Fabric, fit & print
| Material | Airlume combed & ring-spun cotton |
|---|---|
| Fit | Unisex tailored crew neck |
| Printed to order | |
| Sizes | XS, S, M, L, XL, 2XL, 3XL |
| SKU | BC-TWELVEWORDS |
Shipping & exchanges
Ships in 3–4 business days, tracked. See the shipping policy and returns & exchanges.
The story
Behind the Twelve Words, Never Share Them tee
Your wallet backup is only a list of words, and the rule for keeping it fits on a shirt. This tee shows a closed notebook with an elastic strap, the sort of thing you would lock a secret inside, with the rule printed in bold white capitals.
A wallet backup is a short list of words, usually called a seed phrase or recovery phrase. The BIP-39 standard allows lists of 12, 15, 18, 21 or 24 words. Whoever has those words can spend the coins they unlock, so the rule is simple: keep them to yourself. This shirt is a friendly reminder of that rule. It is not a security guarantee, and it does not replace reading up on how your own wallet works.
At a meetup, a bitcoin study group or any room where someone is about to read their backup words out loud, this tee makes the point. It is short enough to take in at a glance, and it gives you a friendly way to say no without a lecture.
Questions
About this design
How many words are in a bitcoin wallet backup?
It depends on the wallet. The BIP-39 standard allows 12, 15, 18, 21 or 24 words, and the shirt's title uses the shortest of those lengths. The number your own wallet uses is the one that matters for your backup.
Does the shirt contain a real recovery phrase?
No. The front is a short written reminder in capital letters, not a set of wallet words, and nothing printed on the shirt can unlock any bitcoin. Keep your real recovery phrase in your own records, and follow your wallet's instructions for it.
Is it a good gift for someone who just started holding bitcoin?
It can be, with one catch: the joke works best with a person who already knows what a recovery phrase is. For a brand-new holder, the shirt is a fun nudge, and the learning can happen with their wallet's own guide. It makes no claims about security, so think of it as a conversation starter.
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