The Shire is a region of J. R. R. Tolkien's fictional Middle-earth, described in The Lord of the Rings and other works. The Shire refers to an area settled exclusively by Hobbit and largely removed from the goings-on in the rest of Middle-earth. It is located in the northwest of the continent, in the large region of Eriador and the Kingdom of Arnor. Its name in Westron was Sûza "Shire" or Sûzat "The Shire". Its name in Sindarin was i Drann.
According to Tolkien, the Shire measured 40 leagues (193 km, 120 miles) from the Far Downs in the west to the Brandywine Bridge in the east, and 50 leagues (241 km, 150 miles) from the northern moors to the marshes in the south. This is confirmed in an essay by Tolkien on translating the Lord of the Rings, wherein he describes The Shire as having an area of 18,000 square miles (47,000 km²).
The Brandywine (Baranduin) river bounds the Shire from the east. (Hobbits also live in Buckland, which lies east of the river and west of the Hedge protecting...
full article at wikipedia