Although there is no official national dress, the traditional dress has been adopted as the unofficial national costume and can be seen on both formal and informal occasions. For women, it is a full-length pasin - a rectangular piece of cloth worn like a skirt or sarong - generally made of Thai silk. The pasin can be of any color and generally has contrasting bands around the hem. It is worn with a long-sleeved silk blouse. On formal occasions a sash may be worn across the breast from the left shoulder to the right part of the waist.

For men, the traditional dress is trousers with a seua phra ratchathan, a short - sleeved shirt (long - sleeved for formal occasions) with a high collarless neck. On formal occasions, a cummerbund is tied around the waist.