Change the font size specified in pixels. Bigger sometimes is better.

Select some text and click the 'Text size' button on the toolbar.


<!DOCTYPE html>
        <title>Redactor X</title>
        <meta charset="utf-8">

        <!-- css -->
        <link rel="stylesheet" href="/your-folder/redactorx.css" />
        <!-- element -->
        <textarea id="entry">...</textarea>

        <!-- js -->
        <script src="/your-folder/redactorx.js"></script>
        <script src="/your-folder/plugins/fontsize.js"></script>

        <!-- call -->
        RedactorX('#entry', {
            plugins: ['fontsize']


By default, the plugin already has a set of sizes installed. You can set your own set this way:

RedactorX('#entry', {
    plugins: ['inlineformat'],
    fontsize: ['16px', '20px', '24px', '32px']