<p>There is very small significant data to put there. Why not to limit the size of this field? 100 bytes is more than enough</p>

CC BY-SA 4.0
2024-12-09T14:50:16.410Z
Yes is more than enough but still not a reason to limit it. If it's enough, then more will not be used but it doesn't need a limitation for this reason.
polespinasa
CC BY-SA 4.0
2024-12-05T10:33:20.783Z
2024-12-05T10:33:20.783Z
amaclin
<p>The 100 byte coinbase limit exists because Satoshi introduced it without giving a justification, and nobody has since gone through the tremendous effort of trying to get the ecosystem to agree to a hardfork to remove it.</p>

CC BY-SA 4.0
2024-12-16T13:32:16.960Z
2024-12-16T13:32:16.960Z
Pieter Wuille
<p>I just read on chapter 12 from Mastering Bitcoin (3rd edition) that the coinbase data size is limited to 100 bytes, why is that?</p>
<p><a href="https://i.sstatic.net/eg0MjevI.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/eg0MjevI.png" alt="Mastering Bitcoin - Chapter 12" /></a></p>

<mining-theory><consensus><coinbase-transaction>
Why is the Coinbase Data Size limited to 100bytes?
polespinasa
# Why is the Coinbase Data Size limited to 100bytes?

(Asked by: username_0 on 2024-12-05)

I just read on chapter 12 from Mastering Bitcoin (3rd edition) that the coinbase data size is limited to 100 bytes, why is that?

[![Mastering Bitcoin - Chapter 12](https://i.sstatic.net/eg0MjevI.png)](https://i.sstatic.net/eg0MjevI.png)

**Tags:** mining-theory, consensus, coinbase-transaction


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## 2 answers

### Answer by username_2 on 2024-12-16. Score: 3 | Accepted answer

The 100 byte coinbase limit exists because Satoshi introduced it without giving a justification, and nobody has since gone through the tremendous effort of trying to get the ecosystem to agree to a hardfork to remove it.


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### Answer by username_1 on 2024-12-05. Score: 0

There is very small significant data to put there. Why not to limit the size of this field? 100 bytes is more than enough

> **Comments:**
> **username_0**: Yes is more than enough but still not a reason to limit it. If it's enough, then more will not be used but it doesn't need a limitation for this reason.  

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