Big Blue sizes are not as advertised!

I spent a large amount of money buying t-shirts that were meant to be size 3XL. None of them were. I think they are probably XL at best and don't even come close to being the size advertised. I have compared them with other shirts I have from Nike, Woolworths, Ecko and Eagle clothing and they do not even come close. This was most disappointing ... and a waste of money.