What is the max length of a public note when attaching it to a bitcoin transaction using blockchain.info? What is the max length of a public note when using this feature on blockchain.info?
Googling this, my first hit was the blockchain.info website FAQ. Under the point "How do I make a public note?" they show the following picture:



I'm gonna go out on a limb here, but I think it means that you can put "Anything you like up to 255 characters." into a public note.