During The Experiment, I decided to keep a length note limit equal to the tweet size1:
280 characters without links
The character limit allows being laser-focused on one thought and keeps Content Boxes straightforward and minimal. But enough to find all the information and links2 you need to dig further3.
If there is a reference, notes, clarifying or other information, then I take it out into footnotes. They do not fall within the limit and can often be larger than the note itself ↩︎
Get yourself familiarized with Progressive Summarization: A Practical Technique for Designing Discoverable Notes - Forte Labs to learn how to compress information effectively ↩︎
In other words, a Zettel must contain the minimum necessary but sufficient information. Context and footnotes help to interpret it correctly ↩︎