My mate recently bought some 15lb multi coloured braid from ebay. It was said to have a diameter of 0.233mm.
When I saw it I was a little shocked.. In truth it's about the same thickness as my 50lb mojiko braid and certainly thicker than my 20lb penn braid said to be 0.233mm and WAY WAY thicker than my 14lb rapala braid that's also said to be 0.233mm.
Hmm, seems 0.233mm is the standard diameter claimed when they cannot be bothered measuring the line?