Hi Sailor,
The Center is 11", the Right rear is 6", and the Right front is 8".
Please reference the "Cooking zones" section on page 16 of the user's manual.
Manual
https://downloadcenter.samsung.com/content/UM/202310/20231019164954424/O_NZ36K7880U_DG68-00824A-06_EN.pdf
Have a great day.
^Aloe