Hi, GLC, I measured my pubic bone height, according to Rivendell's method. It is 80cm or 31 1/2 inches. Rivendell recommends the following if I want one of their bikes:

Rambouillet - 54cm
Saluki - 54cm
Bleriot - 55cm
Atlantis - 53cm if you run big volume tires, or 54.5cm if you plan on
something no larger than a 1.5" tire

I have never seen one of their bikes and there is nowhere anywhere close to test ride one so I doubt this will be my choice.

Kenda