Lengh of drop down field

I just found out that the maximum length of charcters for a drop down field (for instance cb_state) is 10 characters. I would like to store more, say 15 charcaters. How can I change this?

There is no store length limit as their database type is now text. If still varchar it's at most 255. A lot more than 10. Most likely it's the validation that's limiting it to 10 characters, which you can adjust by editing the field in CB > Field Management then under Parameters > Validation adjust its maximum length.

I'm sorry but under parameters I can't find any validation!?

Sorry, the length limit would be for text type fields. A select field doesn't have a length limit at all; so what do you mean my the length? Do you mean the number of options available in the dropdown?

I understand it should be 255 characters. It's not the number of options (just twelve) but the maximum length of the input valuue for this field. Since it always shows the label (also in lists?) I can define a shortcode for each value. But still strange that te value may not exceed 10 characters. The label is ok though.

There is no such limitation in CB. The only reason for that is you changed a fields type and didn't run CB > Tools to correct the database. If your state field is the one generated by our sample data then it was originally a text field. Even then it still doesn't have a database store limit of 10. I recommend running the database tools checks within CB > Tools to correct and database issues. If issue persists try re-creating your field as I've no idea what could be doing that.