Top to bottom: 2004-coin (thickest), 2015-coin (thinnest) and 2018-coin (a little thicker than the 2015).The frame of the Rama IX (left) and Rama X (right) coins.
2009 changes
On February 2, 2009, the
Treasury Department announced changes to several circulating coins. The five-baht coin, which previously weighed 7.5 grams, was reduced to 6 grams by slightly reducing its thickness. Metal composition and other features remain the same as previous issues.[1]
2018 series
The Ministry of Finance announced on March 28, 2018, that the first coins featuring the portrait of His Majesty King Maha
Vajiralongkorn Bodindradebayavarangkun would be put in circulation on April 6.