Uniforms are compulsory for all students with very few variations from the standard model throughout the public and private school systems, including colleges and universities.
The dress code in primary and secondary grades for boys comprises dark blue, khaki, or black shorts with a white open-collar short-sleeved shirt, white ankle socks or long dark socks, and brown or black trainers. Female students, wear a knee-length dark blue or black skirt, and a pale white blouse with a loosely hanging bow tie. The bow tie is dropped in favour of an open-necked pale blue shirt from Matthayom 4.
The girls' uniform is complemented by white ankle socks and black school shoes. The student's name, number, and name of the school are often embroidered on the blouse or shirt. Some independent or international schools have uniforms more closely resembling British school uniform standards, and boys in senior high school grades may be allowed to wear long trousers. The standard dress for children in kindergarten is a red skirt and white blouse for girls, and red short trousers and a white shirt for boys. In all Thai schools, one day per week, usually Wednesday, is dedicated to scouting, when beige scout uniforms for boys and dark green guide uniforms are the rule, both wearing yellow neckerchiefs.
The hairstyle of students is also given attention by schools and the Ministry of Education. Males are not allowed to have long hair. Some prohibit even girls from having long hair. The use of accessories is prohibited for males, while females are sometimes allowed to use simple accessories. Some schools dictate the colour and type of hair accessories that females can be used. All students are prohibited from colouring their hair or having tattoos on any part of the body.
Thailand however has a few international schools which do not require uniforms.