I’m trying to resize the words DESCRIPTION, ADDITIONAL INFORMATION AND REVIEWS in the product details block on the single product template. They are huge and i’ve tried to get into the block to edit it and it doesn’t have any options for that.
Please help because the rest of the website looks so good and then these huge words just kills it.
Unfortunately, the link you provided does not appear to be loading due to an SSL issue on the site. I would recommend addressing this issue with your hosting provider.
Regarding the font sizes, it would help to see the page, however you may be able to change the size of the text within the global style option of the editor under Appearance > Editor in the WP admin. The headings are most likely H2 headings.