Microwave turntable sizes will vary based on the type and size of the microwave oven you own. The motor that’s responsible for turning your microwave plate in combination with the turntable supports (the rack your turntable sits on) must be compatible with the bottom of the tray to operate correctly.
This is why turntable tray sizes, replacement part numbers and microwave model numbers all need to be coordinated to ensure your turntable will — turn.
It’s easy to assume that if your microwave turntable was 11-inches in diameter then any 11-inch glass replacement plate will work but it is what’s beneath the glass plate that counts.
To locate a replacement tray by its size it is also important to note that measurements MUST be to the fractional inch, for the glass plate itself and the microwave turntable roller support ring below it. The motor hub configuration in the center underside of the glass plate must match as well. Please see illustration below.
You can find the model number for your microwave oven usually located either on a side panel inside your microwave oven itself or on the microwave oven’s door frame.
Once you have the model number, you can type it into the search box on the right sidebar of this website at the top or if your model number is not found here, then you can contact the manufacturer’s website directly. Manufacturer’s toll-free customer service numbers are listed in the right sidebar as well for your convenience.