Why does the height of the ceiling matter? It is the length and width of the ceiling that will determine layout.

There are lots of photos on Houzz of vaulted ceilings. They might not be labeled, but you can usually figure out the ceiling height by looking at doors, counters, tables, etc to get an idea of the scale.

Here, this one is around 13 ft. I figured that one out by looking at the chair by the back wall, which are usually around 32" high, so scale that out and it comes to roughly 13 ft.

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Why do you ask?

Just remember that vaulted ceilings cause all kinds of expensive problems in kitchens.