Ah, I think maybe I understand now - have you been reading the tag on the Speedo advertised on Ebay? Maybe you were doing as I was and looking for a size but instead the word "lifeguard" was simply printed - which I thought rather strange as I had never seen a men's Speedo label designed like that before (and the seller is female I believe).
Maybe we now need a size chart to convert for us from womens' clothing sizes to mens' ? (as if we haven't got enough trouble already dealing with Aussie size numbering !).