הלכה על יומא 144:25

And from this reason we can [explain that] which is said (Pesachim 65b) that the length of the robe is obligated to be upon all of his body, from above to the heel below; the length of its sleeve be to the palm of his hand (Yoma 72b); the length of the turban be sixteen ells (Mishneh Torah, Laws of Vessels of the Sanctuary and Those who Serve Therein 9:19) and wrap the whole head, so that he see it any time he raises his eyes; and the length of the sash that he wraps on his loins be thirty-two ells and he wraps and rewraps it on his body, one layer over another, and it comes out that he feels it with his forearms all the time, as due to its thickness from all the wrappings, his forearms touch it regardless. And all of this is a proof to that which we have said, for the one who concedes the truth. Besides [this reason], there is glory to the Temple and to the [Divine] service in the matter that the servant wears special clothes for the service. And we have already written (Sefer HaChinukh 95) that with the aggrandizement of the Temple and its fear, the hearts of sinners will be softened and they will repent to God.