Vexillology is the study of flags. In between the two Thai national flags (fig.), the flags from left to right are the personal flag of Crown Prince Maha Vajiralongkorn (fig.), Queen Sirikit (fig.), King Bhumiphon (fig.), Princess Sirinthon (fig.), and Princess Chulaphorn (fig.).

The only one absent is the personal flag of Princess Ubon Rattana (fig.), which is normal practice since she has renounced her royal titles.