As far as I know the maximum transaction size is 16kB including metadata https://github.com/cardano-foundation/CIPs/blob/master/CIP-0009/CIP-0009.md

However, I recently submitted successfully several transactions whose sizes are larger than 16kB (around 20kB). So I am a bit confused. Please help me clarify it.


  • 2
    Please add Tx hashes or something we can query the chain with!
    – zhekson
    Commented Nov 28, 2021 at 23:00

1 Answer 1


The size corresponds to its representation on chain, not the file you are submitting directly.

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