Changing font size in theme?

Hi
For changing of the title size, put this to your child theme style.css
Change the px number to any you like

.blog-title a {
  font-size: 46px;
}

To change just No. 3
You would have to tweak your header.php file (probably???, I do not know structure/hierarchy of your Theme)

1)Put No. 3 to special container,

<div class="sample3">3</div>
 or
<section class="sample3">3</section>

2)create special class=”sample3″ or id=”sample3″ in that container
3) and then put css like this:
for class:

.sample3 {
  font-size: 46px;
}

for id:

#sample3 {
  font-size: 46px;
}

to your child theme style.css file

Hope this will help
Cheers
Tahoerock

Hi
Do you have a Child Theme ??
If Yes then put this code to the bottom of your style.css file

If not then put it to your style.css file
Not heaving child theme, means that whenever you update your Theme you loose all your changes, like you would do in style.css file

SO

If you do not have a child theme, then the best choice is to install this plugin:

simple-custom-css
and put code to this plugin

Cheers
Tahoerock

Hi keyur11
When you tweak your website, it is important to have child theme.
It protects you from deleting hand changes you made in any css, html, php.
Every time you update you Theme, all the changes you do to your style.css will be lost.
Same is when you are skilled enough and do some tweaking of any php file.
REAL CODING.
You do not know much today, it will change in the future and it is handy to begin with child theme and with backing up your site.
If you do not want to care much to learn, you will need someone to do it for you.
It is pretty easy to shot down your site. 🙂
IT IS VERY IMPORTANT TO BACKUP YOUR SITE, BEFORE YOU DO ANY CHANGES

WHAT YOU ASKED FOR, MEANS TO DO SOME CODING IN THE header.php
That is why it is handy to have Child Theme.
When it is just CSS coding there is another way, by plugin:
simple-custom-css

BUT once you have to touch any php file, it is crucial to have Child Theme!!!!!!!!!
…and this is your case, even you want just tweak one letter/number
Read this:
Child theme
Why use a Child Theme?

How to Create a WordPress Child Theme (Video)

Cheers
TahoeRock