Dont agree to a revision until such time the seller rectifies the error.

He won't, he refused size exchange or refund long before I opened the Paypal dispute.  I think he is probably too "vain" to admit he made a mistake, he clams he is a tailor so would rather face bad feedback than acknowledge that as a "professional" he got the size wrong this time, he seems to get it right most of the time?

I'm not unreasonable or bent on giving bad feedback but all I got was a loss of AU$70.00!

It all went wrong because his measurement guide states the chest measurement should be "snug".  No chest measurement for man should be snug, it should be relaxed!

http://i195.photobucket.com/albums/z70/espionage_fashion/Ah%20Shu%20-%20Suit%20Size/measurementguidefrombodycopy.jpg