I'm 5'9" 130 lbs and generally wear size small. Will I fit a leather jacket labeled size 42? Or is it too big?

http://cgi.ebay.com/Leather-Biker-Jacket-size-42-Please-LF-/230472612783?cmd=ViewItem&pt=US_CSA_WC_Blazers_Tailored_Jackets&hash=item35a93cfbaf#ht_567wt_941