$0.00
We are happy to add pop rivets that fit our ears to your own cap for free as long as you pay shipping.
You will need to post your cap to us. This is not a rivet set, other makers use different sizes, and we haven't found a set that matches the ones we use, so it's not something you can do at home.
Email support@wruffstuff.com to get the address of where to ship your cap.