How do i change h1-h6 font size?

What theme are you using? Where did you download it from?

I have a custom theme

Then try using Firefox with the Firebug add-on for this kind of CSS troubleshooting. Or use whatever developer tool is available in your web browser.

I’m not really sure how to use that.

Here’s an example blog post of mine–> https://www.acneskinsite.com/exfoliate/exfoliating-treatments/

All I’m looking to do is making the h3 heading smaller, b/c atm its way to big.

Currently i just used bold/underline i want to use h3 heading, but its to big.

If you are creating your own theme, you really need to learn how to use CSS inspection tools for your preferred browser.

My website is 100% finished. I just want to change the actual size of the different headings in the drop down box in WP blog post. I like heading 3 but its a bit to big.

You need to amend your theme’s CSS.

Look at your style.css file:

https://www.acneskinsite.com/wp-content/themes/acneskinsite-theme/style.css

All of those elements are defined there.

A browser tool like Firebug will be quite useful in working with CSS too.

OK. My original question was is this correct—

h3 {
font-family:QlassikMediumRegular;
font-size:24px;
color: #5F5F6E;
margin: 0;
padding: 0 0 15px 0;
font-weight: normal;
}

Do i just change font-size:24px; to w/e i want and hit update? That’s all i have to do?

Yes, though you may need to clear your browser cache after making changes.

Also, it’s generally smart to make a back-up copy of any file before you start modifying it – just in case you muck it up :).

Thanks! It’s working.