Flag of Thailand

red : which stands for the blood spilt to maintain Thailand's independence, or often more simply described as representing Thai people.
white : which stands for Buddhism, the predominant religion of the country.
blue : which stands for the Monarchy of Thailand.

Trat Province

http://en.wikipedia.org/wiki/Trat_Province

SaKaeo Province

http://en.wikipedia.org/wiki/Sa_Kaeo_Province

Rayong Province

http://en.wikipedia.org/wiki/Rayong_Province

Prachinburi Province

http://en.wikipedia.org/wiki/Prachinburi_Province

Chonburi Province

http://en.wikipedia.org/wiki/Chonburi_Province

Chanthaburi Province

http://en.wikipedia.org/wiki/Chanthaburi_Province

Yala Province

http://en.wikipedia.org/wiki/Yala_Province

Trang Province

http://en.wikipedia.org/wiki/Trang_Province

SuratThani Province

http://en.wikipedia.org/wiki/Surat_Thani_Province