New toolbar feature added in TinyMCE v6.4.1 to specify exact font size https://portal.productboard.com/jr9yarel4qgc7g1wrfwtwssx/c/100-use-any-font-size-using-the-new-input-font-size-toolbar-button [Documentation in TinyMCE](https://www.tiny.cloud/docs/tinymce/6/6.4.1-release-notes/#new-fontsizeinput-toolbar-item-which-allows-the-user-to-set-the-size-via-input-and-also-increase-and-decrease-it-with-and-buttons)
New toolbar feature added in TinyMCE v6.4.1 to specify exact font size
https://portal.productboard.com/jr9yarel4qgc7g1wrfwtwssx/c/100-use-any-font-size-using-the-new-input-font-size-toolbar-button
Documentation in TinyMCE