New Revised Standard Version
And the west boundary was the Mediterranean with its coast. This is the boundary surrounding the people of Judah according to their families.

Contemporary English Version
which was Judah's western border. The clans of Judah lived within these borders.

New American Bible
The western boundary was the Great Sea and its coast. This was the complete boundary of the Judahites by their clans.

Douay-Rheims Bible
These are the borders round about of the children of Juda in their kindreds.

These are the borders round about of the children of Juda in their kindreds.

the great sea

Joshua 15:47 Azotus with its towns and villages. Gaza with its towns and villages, even to the torrent of Egypt, and the great sea that is the border thereof.

Numbers 34:6,7 And the west side shall begin from the great sea, and the same shall be the end thereof. . . .

Deuteronomy 11:24 Every place, that your foot shall tread upon, shall be yours. From the desert, and from Libanus, from the great river Euphrates unto the western sea shall be your borders.

Ezekiel 47:20 And the side toward the sea, is the great sea from the borders straight on, till thou come to Emath: this is the side of the sea.