I wanted to check, if you can tell us, how we could modify the font size of your Product Attachement text. 


To edit the Product Attachment text, can you please add the following css to your theme:

.productattachment_listattachment_block h3 {font-size: 12px} -> to edit  the tab's font and size

.productattachment_listattachment_block .attachments li {font-size: 10px} -> to edit the download file's text