I'm sure this has been asked before but can someone give me an idea of what size thread in the "aught" sizes (ie 2/0 or 6/0) most closely compares to the 210 dernier thread? I'm comfortable with the 210 dernier thread but some of the other companies have some different colors I'd like to try. Also, am I correct in understanding that 6/0 is smaller than 2/0 thread?