What is the cutting height of each wheel notch?

Hello,
I have a Toro 22" (56cm) SMARTSTOW® Variable Speed High Wheel Mower (model 20339). What is the cutting height for each notch? The manual lists 9, but the mower only has 5 notches to raise or lower the cutting height. How many inches is each notch?
Thanks!

There are 9 different cutting heights on your mower. You adjust either on the notch or between the notches. Each step is approximately 1/2”.