As there are many conflicting views of what Thai airways luggage limits are, I wrote to them and asked them. This is their reply "word for word" (lets see if its any clearer to you, as its certainly NOT to me!!!)

"Please find informations below regarding luggage conditions and restrictions. Please note that weight and piece system whichever that may apply to your booking is also printed on your ticket/e ticket. These are guaranteed as your checked in luggage and hand carry. If any extra weight allowed at each ports is based on the flights weight and airport controllers discretion. Therefore this can only be subject to space available of each flights. Thai Airways flights out of Sydney Airport we advise 25kg for checked in luggage any more would be up the airport controller advise on the day of the flight."

The email then goes on to list the official weight and size limits as are on their website.

So .... as I said, I am no clearer to what the limits are. Im certainly no frequent flyer and have little knowledge of these things. But ... it would seem to me that it is all "up to the airport controller" and "subject to space available on each flight"!!!!! To me ... this seem lludicrous and extremely random. I guess the only way we cd be safe is to stick to the 20/7kg limits!!!

Cheers! 'Kitty Kitty