Lying about 7.5 kilometers off of Pattaya by a 45-minute ferry or 15 minutes by speed boat ride, the island measures 2 kilometers by 5 kilometers and offers several white sandy beaches, notably Hat Ta Waen, Hat Laem Thian and Hat Thong Long, the latter facing coral reefs. Visitors can choose either snorkeling or viewing the coral from glass bottom boats. Ferries to the island leave South Pattaya pier daily from 10.00 a.m. to 6.30 p.m. Cruises by sailing junks, with lunch provided are also available.
http://www.tourismthailand.org/attraction/chonburi-20-3287-1.html