In my house its at 10 feet and it looks just right

could you do a coffered ceiling at 9ft and have it still look ok?

I think it would depend on the room , and style of moulding you will use for coffered ceiling , if you r making in a kitchen then from my experience i can tell you that upper cabinets are fixed at 54" from floor , now add the size of your cabinets plus their crown moulding , 1 feet for space between finished cabinet height and coffered ceiling . Usually the the height measurement of coffered ceiling frame runs between 6"-1feet depending on the design you choose . I 'm not a professional designer or builder so I'm telling you from my experience from my own house being built at this moment .

Thank you for that information. I did not specify it is in our dinning room. The room size is 14x13. Thank you again.

i will take a pic of my ceilings and will share it with you then you make your decision

The ceiling in the photo is only a little over 9 feet high as well.

Cameo Kitchens, Inc. Is the ceiling height a little over 9 feet high to the bottom of the coffer or including the coffer?

Its to the bottom of the coffer. Height dose not include the coffer