It may seem like something very simple to do, but beginners often find changing the font size in WordPress to be a bit confusing. You don't have to be confused any longer. Here are quick and easy instructions for changing the font size for your posts and pages.
<h2>Paragraph Headings</h2>
Within your visual editor, you will be able to change the size of the font with the "Paragraph" dropdown menu.

<img class="aligncenter size-full wp-image-6664" src="https://itxdesign.com/wp-content/uploads/2014/04/ParagraphHeadingFontSize.png" alt="Paragraph Heading Font Size" width="174" height="368" />

From this menu, you can change the size with the heading settings. This is the easiest way to create a different size text when creating a post or a page for your WordPress website.
<h2>TinyMCE Advanced Plugin</h2>
Another way to change the font size in WordPress is by installing the <a href="http://wordpress.org/plugins/tinymce-advanced/">TinyMCE Advanced Plugin</a>. This plugin allows you to customize the options you have for editing your visual editor. You can add and subtract options through the settings menu of this plugin.

Once you've installed the plugin, you will want to add the "Font Size" option to your menu. This will allow you to choose the size of the text from 8pt and up.

<img class="aligncenter size-full wp-image-6665" src="https://itxdesign.com/wp-content/uploads/2014/04/TinyMCEAdvancedPlugin.png" alt="TinyMCE Advanced Plugin" width="202" height="205" />

These are the two easiest ways to change the size of your font within a post or page. Whether you prefer to use headings or you prefer the font size dropdown menu, you can attract more attention by changing the size of your text.
<h2>What Size Font Should You be Using?</h2>
For the best SEO benefits, you will want to use multiple headings with every post and page possible. Using the Heading 2 or the 18pt size is best for the subheadings. This will allow you to gain more SEO benefits from your overall content.

Other times to use larger or smaller text include:
<ul>
	<li>Fine Print for Products</li>
	<li>Image Headings</li>
	<li>Links</li>
	<li>Anytime you want to draw additional attention</li>
</ul>
Follow these tips and you can direct the attention of your readers to the portion of your content you want them to see most.

Now you know how to change the font size within WordPress in two different ways. Both methods work in their own way.