Hello Bashiro,
You can use a bit of custom CSS to achieve what you need:
In your WP admin go to Appearance > Customize. Find the Additional CSS / Custom CSS option, and click on it. Add the following line(s) of code in the text area for the custom CSS:
1. To increase the font size for the filter title:
.awf-preset-wrapper .awf-filter-title { font-size: 35px; }
2. To make the filter title font bold add:
.awf-preset-wrapper .awf-filter-title { font-weight: 600; }
3. To increase the font size for the filters labels:
.awf-preset-wrapper .awf-filter-container:not(.awf-product-search-container) label { line-height: 25px; font-size: 25px; }
4. If the font increased so much that the product counts start losing the correct position, adjust this to the same as line-height for the label:
.awf-preset-wrapper .awf-filter-container .awf-filter-count { line-height: 25px; }
Save the custom CSS option (by pushing the Publish button) and reload your shop page. If you can’t see any changes, you may need to clear your browser cache (read about clearing Chrome browser cache here). You can adjust the font-size values (from 25px to 20px etc) according to your preference.
We have had quite a few requests for this kind of CSS tweaks, so these may be added as plugin styling options in one of the later releases, but for now hope this helps. Let me know if you need more help with this.
Sincerely yours,
Anastasia