QAC - Import errors

Hello,

I am importing requirements in QAC.

I am getting error as below - 

Line 2: The string is too long,

Column: Custom8 Length: 30 MaxLength: 20
Column: Custom9 Length: 321 MaxLength: 256
Column: Custom18 Length: 65 MaxLength: 50
Column: Custom12 Length: 26 MaxLength: 20

Where can I get all of the character length information ?

Also 'Custome8' means is it 'Column8' in my csv file? That is a 'Description' column, hence does not make sense to have max length:20