NET
13 until we all attain to the unity of the faith and of the knowledge of the Son of God—a mature person, attaining to the measure of Christ’s full stature.
Darby
13 until we all arrive at the unity of the faith and of the knowledge of the Son of God, at [the] full-grown man, at [the] measure of the stature of the fulness of the Christ;
KJV
13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ: