TLDR: If I want to change font size in WordPress, I can use headings, Typography settings in the block editor, Advanced Editor Tools plugin controls, Full Site Editor global styles, or custom CSS code. Each method helps improve content readability, accessibility, branding, SEO, and overall user experience across my website.
Why would I change font size in WordPress?
I often see users asking questions like how to make blog text easier to read, how to highlight affiliate product information, or how to control typography across an entire website. If I am running a blog, an eCommerce store, or a business site, font size directly affects website readability, accessibility, and visually appealing design.
As you know, users skim content quickly, especially on mobile devices. Adjusting typography helps them consume information comfortably. Search engines also rely on headings, paragraph text structure, and content sections to understand pages better, which improves SEO.
In addition, typography plays a big role in branding. When I customize design elements like font size, spacing controls, and appearance settings, my content looks more professional and easier to navigate.
Method 1: How I use headings to control font size
Adding headings in the block editor
When I open a post or page in the block editor, I click the Add Block button to open the block menu and insert the Headings block. The editor usually sets it to Heading 2 by default, which I can change using the H2 dropdown, toolbar, or block settings panel.
Headings create a clear hierarchy between body text and paragraph text while dividing posts and pages into readable sections. They also help search engines assign more importance to structured content.
From the block settings panel, I can adjust color customization, letter case, typography styling, and appearance settings. After finishing, I click Update or Publish to save the changes.
Using headings in the classic editor
If I am using the classic editor, I select text and use the Paragraph dropdown to convert it into a heading. However, deeper customization requires editing the stylesheet or style.css because typography controls are limited there.
Method 2: How I change paragraph font size in the Gutenberg editor
When I want to adjust paragraph text instead of headings, I open a page in the Gutenberg editor and select a Paragraph block. Then I switch to the Styles tab inside the block panel and go to the Typography section.
Here I can change font size to small, medium, large, or extra large. If I want to restore the default font size, I use the Reset option in the dropdown menu.
In addition, I can enable drop caps, adjust letter casing, modify spacing controls, and tweak formatting options. These typography controls help maintain accessibility and visual consistency across content.
Method 3: How I use Advanced Editor Tools for font size control
When I need more formatting features, I install the Advanced Editor Tools plugin. After plugin installation and activation, I get additional formatting features like font family controls, font size dropdown options, subscript formatting, emoticons, and source code tools.
From the Settings page in the WordPress admin sidebar, I use the drag and drop interface to move tools from the Unused Buttons section into the Classic Paragraph block toolbar. Then I enable the Font Sizes option in the Options section and click Save Changes.
From the dashboard, I open a page, insert the Classic Paragraph block using the Add Block button, and adjust typography using the font size dropdown.
Method 4: How I change font size across my entire website
Using the Full Site Editor and global styles
If I am using a block theme, I prefer the Full Site Editor because it allows site-wide typography control without coding. I visit the Appearance Editor page and click the Styles icon to open Typography settings.
Inside this panel, I can modify the Font section and adjust styling inside the Elements section, including the Text tab, links, captions, buttons, and headings. This allows me to control site-wide typography from one place.
Editing font size presets
Font size presets define typography scale across the website. These presets use rem units to standardize text sizes across components.
For example, small, medium, and large presets can be customized to match branding and readability preferences. After modifying presets, I click Save settings to apply them across the website.
Method 5: How I change font size using CSS code
When I want full typography control, I use CSS code to define font-size values for paragraph selectors. I paste the code into the Code Preview box of a custom snippet, configure the insertion method, enable Auto Insert mode, and use the activation toggle.
After saving the snippet, typography changes apply across posts, pages, and themes. This method gives precise control over site-wide typography and content readability.
Bonus: How I change text color in WordPress
Font size and text color work together to improve visually appealing content and branding. Inside the block editor, I select a Paragraph block, open the Styles tab, click the Text option, and use the color picker tool to choose a color.
For site-wide color changes, I modify CSS selectors such as the paragraph selector, h1 selector, h2 selector, and h3 selector. This helps highlight important information and improves accessibility.
How typography improvements impact SEO and user experience
When I optimize typography across WordPress posts and themes, I improve website readability, accessibility, visual hierarchy, and mobile device readability. This also makes affiliate product content easier to notice and increases engagement and conversions.
Search engines prefer structured content that uses headings, consistent paragraph text, and readable typography. As a result, improving typography helps both users and SEO performance.
To summarize, changing font size in WordPress is not just about design. It improves communication, accessibility, branding, and usability. When I manage typography using the block editor, classic editor, plugins, global styles, and CSS code, my website becomes easier to read, easier to navigate, and more effective at delivering content.