Paragraph indentation in Thai

[xfq]

https://www.w3.org/International/sealreq/thai/#para_indent

Thai does indent the initial line of a paragraph.

How much is the initial line of a paragraph usually indented? I see that Wikipedia indents 2.5em.

Here's an example section on first-line indents: https://www.w3.org/TR/clreq/#first_line_indents

[srakrn]

Thai official documents (citing a file found on The Prime Minister's Office website, https://www.opm.go.th/multimedia/mallikku/File/%E0%B8%95%E0%B8%B1%E0%B8%A7%E0%B8%AD%E0%B8%A2%E0%B9%88%E0%B8%B2%E0%B8%87%E0%B8%AB%E0%B8%99%E0%B8%B1%E0%B8%87%E0%B8%AA%E0%B8%B7%E0%B8%AD%E0%B8%A0%E0%B8%B2%E0%B8%A2%E0%B8%99%E0%B8%AD%E0%B8%81.pdf) use 2.5cm.

Microsoft Word's default "tab width" for the indent is 2.54cm (1 in), and people around me rarely modify this.