This Bitcoin t-shirt is the protocol's full spec sheet. Back print: block reward stair-step (50 → 25 → 12.5 → 6.25 → 3.125 BTC), difficulty and hashrate curves, supply asymptote at 21M, mining hardware evolution, block anatomy, halving formula. Footer: "21M Asymptote. Programmed Scarcity. Since 2009."
For the Bitcoin holder who teaches the halving like a CFA chapter. Premium midweight Bella+Canvas 3001, drop-shoulder fit, oversized back print. Wear the whitepaper.
We ship worldwide. Free shipping on US orders over $95. Standard US delivery is 5–10 business days; international orders typically arrive in 10–20 business days. International shipping rates are calculated at checkout.
Unisex fit (Bella+Canvas 3001 blank). Runs true to size. Between sizes? Size up. Measurements are the flat garment in inches.
| Size | Chest width (in) | Body length (in) |
|---|---|---|
| S | 18 | 28 |
| M | 20 | 29 |
| L | 22 | 30 |
| XL | 24 | 31 |
| 2XL | 26 | 32 |
| 3XL | 28 | 33 |
How to measure: lay a tee you own flat — chest width is armpit-to-armpit, body length is collar seam to hem. Mugs & puzzles are one size.
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