[Theme: Bose] Changing page title size

Hi guys, so this seems to be a common problem but I still couldn’t figure it out. I tried changing a lot of the numbers in various .php and .css files but it didn’t work. Here is my site: http://www.goodairlanguage.com/spanish-podcasts/

You can see that the “Spanish Podcasts” title is too small I wrote “The Best Spanish Podcasts” in the content section so it is not technically the title.

Thanks in advance!