Charles Ellicott Commentary Exodus 28:8

"And the skilfully woven band, which is upon it, wherewith to gird it on, shall be like the work thereof [and] of the same piece; of gold, of blue, and purple, and scarlet, and fine twined linen." — Exodus 28:8 (ASV)

The curious girdle. —The word k hésheb, which is translated this way, properly means “device” or “ornamental work,” and does not in itself have the sense of “belt” or “girdle.” Still, there is no reason to doubt that the k hêsheb of the ephod was in fact a girdle, as Josephus calls it (Antiquities of the Jews, Book 3, Chapter 7, Section 4), though named from the peculiar skill displayed in its patterning. Josephus says it was “a girdle dyed of many hues, with gold interwoven in it.”

Shall be of the same. —Not sewn on, but woven continuously with the front or back piece.