I use TinyMCE Advance plugin. I've posted a question in the support forum of the the plugin but it seems that the author doesn't provide any support now. As you can see in the picture, the font size 12pt is the default font size. Every time I open the TinyMCE Advance editor, the size 12pt displays in the default state. How can I change the default size to 14pt and remove the size 8pt, 10pt,12pt?

I've done some research and it's was recommended that I go to:


and change the size in

body {
    font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif;
    font-size: 18px;
    line-height: 1.5;
    color: #333;
    margin: 9px 10px;
    max-width: 100%;
    -webkit-font-smoothing: antialiased !important;
    overflow-wrap: break-word;
    word-wrap: break-word; /* Old syntax */

In this case, I've changed it to 18pt, but it doesn't work. The thing is that the default 12pt size is still there. It just changes only when I click inside the text editor area; it will change from the 12pt (that displays as default) to 14pt. But actually when I type a text and publish, the result is the published text still displays 12pt size, not 14pt. So that means I have to select a font size 14pt in the drop-down list anyway in order to get the size 14pt.

enter image description here

  • the values for thsi dropdown are created by this file wordpress\wp-includes\js\tinymce\tinymce.min.js . Therefore the best approach I can think of if to create a js file to change those values and hook it after the admin loads.
    – vagelis
    Commented Aug 30, 2017 at 10:27
  • No easy way to remove the unwanted sizes there directly in the tinymce.min.js?
    – Topy
    Commented Aug 30, 2017 at 11:34
  • You can edit the file and remove them, but you have to do that every time to Wordpress Core updates. The optimal solution is to create a plugin to include everything we speak of.
    – vagelis
    Commented Aug 30, 2017 at 11:47
  • I see. But I cannot create that plugin. If you don't mind helping me with that. Supposed if I wish to remove them direct from there, which one I have to remove?
    – Topy
    Commented Aug 30, 2017 at 12:14
  • The one you don't want to be displayed in the dropdown
    – vagelis
    Commented Aug 30, 2017 at 13:17

3 Answers 3


This is kind of a 2-parter. The first half will show you how to change the style inside TinyMCE when editing. The second half will show you how to remove things from the toolbar.

Style TinyMCE

WordPress give us a neat little function called add_editor_style() which accepts an array of stylesheets, either by URL or relative paths. WordPress default themes usually take advantage of this function and can be seen in the latest TwentySeventeen theme. First let's create a stylesheet. The name doesn't matter but the location does.

textarea {
    font-size: 14pt;

For simplicity we'll call this editor-style.css and save it in the theme:


Next we need to tell WordPress to use our stylesheet so we'll open the themes functions.php file and add in:

 * Theme setup functionality
 * @return void
function prefix_theme_setup() {

    // Relative path to the TinyMCE Stylesheet
    add_editor_style( array( 'assets/css/editor-style.css' ) );

add_action( 'after_setup_theme', 'iqt_theme_setup' );

Some plugins could interfere with this such as page builders if they implement their own TinyMCE.

Modify Toolbar

Next, we can use the tiny_mce_before_init filter hook to modify the TinyMCE. In this case, all we need to do if override the font sizes. You can add the following function into your functions.php file:

 * Add Formats to TinyMCE
 * - https://developer.wordpress.org/reference/hooks/tiny_mce_before_init/
 * - https://codex.wordpress.org/Plugin_API/Filter_Reference/tiny_mce_before_init
 * @param array $args   - Arguments used to initialize the tinyMCE
 * @return array $args  - Modified arguments
function prefix_tinymce_toolbar( $args ) {

    $args['fontsize_formats'] = "14pt 18pt 24pt 36pt";

    return $args;

add_filter( 'tiny_mce_before_init', 'prefix_tinymce_toolbar' );

The $args array has an index that accepts a list of font sizes separated by spaces. You can change these to whatever you want, px, em, rem it doesn't matter, just that the list is separated by a space and is a valid font-size value.

  • Your code also works. But I skip the first one as I already use 14pt in the syle.css in my child theme.
    – Topy
    Commented Mar 8, 2018 at 4:37

I use only this one. It Works for me. What is the different between this code and your code?

// Customize TinyMCE editor font sizes
if ( ! function_exists( 'wpex_mce_text_sizes' ) ) {
    function wpex_mce_text_sizes( $initArray ){
        $initArray['fontsize_formats'] = "14pt 18pt 24pt 36pt";
        return $initArray;
add_filter( 'tiny_mce_before_init', 'wpex_mce_text_sizes' );
  • Well, the first half of my code allows you to globally change the default font size in the editor, for display. The second half of my code is pretty much the same as you have it above.
    – Howdy_McGee
    Commented Mar 8, 2018 at 15:22

This is the Answer, It work for me:

  1. Look for functions.php in root of your themes directory inside /wp-content/themes/yourtheme/, open it up and add one line after php tag.


  2. In the same directory, create a file called custom-editor-style.css with below lines in it

    @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700);
    * { font-family: 'Open Sans', sans-serif, Arial, Helvetica;}

Go ahead, clear your browsers cache and this is what you’ll see.

Refer link: https://blog.phi9.com/wordpress-editor-and-its-font/

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