The maximum length for column headers in a Mixpanel lookup table is not explicitly stated in the provided knowledge sources. However, it's important to note that the first row of the lookup table is a header row and the values in the header must be unique, as each one uniquely identifies a column of the table. These will appear as properties of the lookup table in Mixpanel's UI.
For more details, you can refer to the Mixpanel documentation.
