Exodus 28:4

Overview - Exodus 28
Aaron and his sons are set apart for the priest's office.
Holy garments are appointed.
The ephod and girdle.
15 The breast-plate with twelve precious stones.
30 The Urim and Thummim.
31 The robe of the ephod, with pomegranates and bells.
36 The plate of the mitre.
39 The embroidered coat.
40 The garments for Aaron's sons.
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Exodus 28:4  (King James Version)
And these are the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest's office.

a breastplate
{Choshen,} in Hebrew is used for the square breast-plate of the high priest, in which were set twelve precious stones, each being engraved with the name of one of the sons of Jacob.
15 ; 39:8-21 Isaiah 59:17 ; Ephesians 6:14 ; 1 Thessalonians 5:8 ; Revelation 9:17

The ephod seems to have been a short cloak, without sleeves.
6-14 ; Exodus 39:2-5 Exodus 39:21 Exodus 39:22 Leviticus 8:7 Leviticus 8:8 ; 1 Samuel 2:18 ; 22:18 23:6 30:7 2 Samuel 6:14

a robe
The word {meil,} from {lah,} to ascend, go up on, may be considered as an upper garment that goes up or over the rest, a surtout.
31-34 ; Exodus 39:25 Exodus 39:26

Exodus 28:29 Exodus 28:40 ; Leviticus 8:7

a mitre
39:28 Leviticus 8:9

a girdle
Isaiah 11:5