Ready Fit covers ONLY work with a standard bucket seat.
Below, you can see the grey seat has NO Recessed headrest, NO Flared bolsters and bottom is not thick (please see 'semi custom will fit' image below).
You can also see the black seat - the back tapers at the top (that gives the seat a sport like look), the bolsters are flared, and the seat cushion bottom is thick (please see 'only custom will fit' image below).