<prompt> Human: I am planning on traveling overseas out of LAXlos Angeles airport around december and want to purchase an diamond ring on Tiffany Co. as duty free.But I am afraid they wont have the size. Someone told me that I can just buy it right now and once I get to the airport , I am can get my tax money back? Is this even remotely true?If no, what would be the best way to get the ring from duty free shop?  <response>: Off topic but why go through the trouble of typing LAX only to spell it out in parentheses right after? Youre driving me insane. Thanks. 