Changing link style in a CMS post


I’ve used the class “ALL Links” to the format I’d like in the standard rich text elements. However when I create a header in a CMS Blog post and want to link it there is no way for me to keep the header size in the CMS editor. Is there a workaround for this?

I’ve attached an image. The “Harvest Host” is a link but I want to change it the size of header in CMS editor. Any help?