I have SEVERAL trays for microwaves.
-Square & rectangular--Various sizes UP TO 14.5 x 14.5 inches .
-Round----Various sizes UP TO 15 inches diameter .
Firstly, measure for the size you need and I'll tell you if I have one . I also need to know the SHAPE ( see above ) .
Secondly, the price isn't necessarily $11 , it will depend on the tray you need. We both know these aren't cheap, but feel free to make an offer when you send me the size you want .
Thirdly, does your microwave have a built-in turntable ?
I can't help you without the above information.