A Tau Robe is a very simple gown cut to resemble the Greek letter, "Tau

Tau

Tau is the 19th letter of the Greek alphabet. In the system of Greek numerals it has a value of 300.The name in English is pronounced , but in modern Greek it is...

," or "T". The arms are usually from fingertip to fingertip, and the bottom hem is usually floor length, as with a ceremonial tabard

Tabard

A tabard is a short coat, either sleeveless, or with short sleeves or shoulder pieces, which was a common item of men's clothing in the Middle Ages, usually for outdoors. It might be belted, or not...

. Both the arms and body of the gown will have a flair so that the sleeves are wider at the fingers than at the armpits, and the bottom wider than at the chest. This loose fitting helps with maneuverability while wearing the robe.