Ionic Order
The total height should be divided into six parts. Then the upper sixth will be the entablature, and one ninth of the remainder the diameter of the column, hence the column will be nine diameters high.
The capital is half a diameter high; the base also is half a diameter.
The total height of the entablature is divided into ten parts, three of these should be taken as the height of the architrave, three that of the frieze and the remaining four that of the cornice.