Roman Ionic
| Roman Ionic Design # 230RI – Plain, 235RI – Fluted |
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| Bottom Dia. | Cap Outside Dia. | Cap Height | Abacus Width |
| 6″ | 5 1/4″ | 2 1/4″ | 6 1/8″ |
| 8″ | 6 1/2″ | 3″ | 8 1/4″ |
| 10″ | 9″ | 3 5/8″ | 11″ |
| 12″ | 10 1/2″ | 4 1/2″ | 12 1/2″ |
| 14″ | 13″ | 5 1/2″ | 17 1/2″ |
| 16″ | 13 1/2″ | 6 1/8″ | 17 1/2″ |
| 18″ | 16 1/4″ | 6 1/2″ | 20″ |
| 20″ | 18″ | 8 3/4″ | 25″ |
| 22″ | 18 3/4″ | 8 3/4″ | 25″ |
| 24″ | 20 1/2″ | 9″ | 25 1/4″ |
| 26″ | 22 3/4″ | 9 1/2″ | 26 1/2″ |
| 28″ | 25″ | 12 1/2″ | 32″ |
| 30″ | NA | NA | NA |