GOD'S WORD® Translation
Then the breastplate should be fastened by its rings to the rings of the ephod with a violet cord. This will attach it just above the belt of the ephod and will hold the breastplate in place.

American Standard Version
And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be upon the skilfully woven band of the ephod, and that the breastplate be not loosed from the ephod.

Berean Study Bible
The rings of the breastpiece shall be tied to the rings of the ephod with a cord of blue yarn, so that the breastpiece is above the waistband of the ephod and does not swing out from the ephod.

Douay-Rheims Bible
And may be fastened by the rings thereof unto the rings of the ephod with a violet fillet, that the joining artificially wrought may continue, and the rational and the ephod may not be loosed one from the other.

English Revised Version
And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be upon the cunningly woven band of the ephod, and that the breastplate be not loosed from the ephod.

King James Bible
And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be above the curious girdle of the ephod, and that the breastplate be not loosed from the ephod.

World English Bible
They shall bind the breastplate by its rings to the rings of the ephod with a lace of blue, that it may be on the skillfully woven band of the ephod, and that the breastplate may not swing out from the ephod.

Young's Literal Translation
and they bind the breastplate by its rings unto the rings of the ephod with a ribbon of blue, to be above the girdle of the ephod, and the breastplate is not loosed from the ephod.

Exodus 28:28 Additional Translations ...