How we could modify the font size of your Product Attachement text. See attached. We want to make it a little bit smaller?

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