Nan 740 km. Chao Phraya 370 km. Phuket 543.00 sq.km. Samui 239.90 sq.km. Chang 212.09 sq.km.
Thin cotton is the best.
A jacket or sweater may be necessary in the cool season, especially in a mountainous area in the North or Northeast. 220 volts 50 cycles throughout the country. Drink only bottled or boiled water. You have wide range of good buys to choose from. They are beautiful because Thais are gifted artists, and inexpensive because the labor cost is low.