Five horizontal stripes of red, white, blue, white and red, the middle stripe twice as wide as the others. The flag name called "Thong Trairong" (Thai: ธงไตรรงค์—also referred as "Trairanga") which means the tricolour flag.
Originally, Vajiravudh assigned this flag as a civil flag.[1] He also stipulated that a separate flag for each government ministry be made by charging additional emblem onto the center of the flag.
A yellow plain square flag with a dancing red Garuda in the center. Usually mounted in front of the car boarded by the King.
1911–
Standard of the Queen of Thailand
King's Standard in ratio 2:3 with swallow-tailed end.
1979–
Standard for Senior members of the Royal Family (usually the Princess Mother)
Queen's Standard in ratio 2:3 with swallow-tailed end. The blue middle square depicts the Royal Crown atop two bowls on a table flanked by two five-tiered royal umbrellas.
Yellow flag (the King's birthday colour), the middle the depicts the Royal Cypher (ภ ป ร: ภูมิพลอดุลยเดช ปรมราชาธิราช : Bhumibol Adulyadej Paramarajadhiraja (Thai equivalent to Bhumibol Rex)), topped by the Great Crown of Victory, in between is the Thai symbol for Aum.
Blue flag (the Queen's birthday colour), the middle is Queen Sirikit's Royal Cypher (ส ก: สิริกิติ์ กิติยากร: Sirikit Kitiyakara), topped by the Great Crown of Victory.
White flag in ratio 5:6 with the Emblem of the Ministry of Defence in the center. The emblem consists of a red chakra (Army), the dark blue anchor (Navy) and the sky blue wings (Air Force).
Red flag with the emblem of Royal Thai Army: a chakra under Unalom and the Thai royal crown with rays flanked by the wreaths (from Flag law B.E.2522 (1979)).
A national flag with the emblem of Royal Thai Navy in the center: a chakra inserted with an anchor under the Thai royal crown. The design is identical to Thai naval unit colours. Note that all Thai Army, Navy and Air Force unit colours called "Thong Chai Chalermphol" (ธงชัยเฉลิมพล).
Black or green is color of Islam, the middle the depicts the Shahada (Lā ʾilāha ʾillā-llāh, muḥammadur rasūlu-llāh), symbol of The Central Islamic Committee Organizations and Muslims in Thailand.
Diplomatic flags
Flag
Date
Use
Description
1927–
Ambassador Standard of Thailand
A blue disc containing a white elephant in regalia centred on the national flag.
1927–
Consular Flag of Thailand
Triranga surmounted with blue disc containing a white elephant.
Green Flag with the Seal of the Bangkok Metropolitan, in white at the center. Used by the Bangkok Metropolitan Administration and the Governor of Bangkok.
A white elephant facing to the hoist in the red flag. Called in Thai language "Thong Chang" (ธงช้างเผือก)[2] (the elephant flag).
1916–1917
State flag and ensign of Siam
Red flag with a white elephant in regalia.
1916–1917
Current civil flag and former ensign of Siam
Five horizontal stripes flag like the "Trairanga" but the middle stripe is red.
War flags
Flag
Date
Use
Description
1917–1918
War flag of Siam (World War I), Obverse
Triranga defaced with a red disc containing dressed white elephant, facing a flagpole. Briefly, its appearance is the same as naval ensign, but both red banners of the flag contains a stanza from a Buddhist chant in Pali, written in Thai script: "พาหุํสหัส์สมภินิม์มิตสาวุธัน์ตํ ค๎รีเมขลํอุทิตโฆรสเสนมารํ ทานาทิธัม์มวิธินาชิตวามุนิน์โท ตัน์เตชสาภวตุเมชยสิทธินิจ์จํ".
1917–1918
War flag of Siam (World War I), Reverse
Triranga defaced with a red disc containing Vajiravudh's personal emblem. The emblem features Thai acronym "ร.ร." and Thai digit six ("๖"), both are displayed under the glowing crown. Both red banners of the flag contains the same chant in Thai script as the obverse.
Diplomatic flags
Flag
Date
Use
Description
1912–1917
Ambassador Standard of Siam
State flag with blue circle at its canton. The circle contains Garuda holding crown.
1912–1917
Consular Flag of Siam
State flag with blue circle at its canton. The circle contains Garuda with outstretched wings.
1917–1927
Ambassador Standard and Consular Flag of Siam
Triranga surmounted with white elephant, facing a pole.