PROJECT PRICING available for Trade Professionals
The bowl height it 16 1/4 and with the toilet seat it will come to about 18" here is the spec sheet that will show you the height and dimensions of this toilet.
The thickness of a washlet and a regular toilet seat are going to be very close. Both vary from 1 to 1.25 inches.
All toto washlets work with this model toilet so long as they are elongated washlets.