How big is Koh Samui Thailand?

Koh Samui lies in the Gulf of Thailand off the east coast of the Kra Isthmus. The total land area of the island is 228.7 km², with the max length and width being 25 km and 21 km respectively. The highest elevation is 635 m (2,083 ft). As of 2017, the population of Koh Samui is 67,265.