Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
With regard to dress, there is no special garb peculiar to the orator, but his dress comes more under the public eye than that of other men. It should, therefore, be distinguished and manly, as, indeed, it ought to be with all men of position. For
Consequently it follows that in view of the fact that their arms were, like those of the Greeks, covered by the garment, they must have employed a different form of gesture in the exordium from that which is now in use. However, I am speaking of our own day. The speaker who has not the right to wear the broad stripe, [*](Worn by senators.) will wear his girdle in such a way that the front edges of the tunic fall a little below his knees, while the edges in rear reach to the middle of his hams. For only women draw them lower and only centurions higher.
If we wear the purple stripe, it requires but little care to see that it fills becomingly; negligence in this respect sometimes excites criticism. Among those who wear the broad stripe, it is the fashion to let it hang somewhat lower than in garments that are retained by the girdle. The toga itself should, in my opinion, be round, and cut to fit, otherwise there are a number of ways in which it may be unshapely. Its front edge should by preference reach to the middle of the shin, while tie back should be higher in proposition as the girdle is higher