Thank you for viewing! This is a cute butterfly accessory for earphones. You might have seen these on social media. They're super cute in person too! The opening for attaching the accessory is narrow (about 4mm) - see photo 5. Therefore, it's difficult to attach unless the part you're attaching it to is silicone. Even with silicone, it's a little difficult to attach, but it's so cute, you can forgive it ☆彡 The earphones I use don't allow the case to close when the accessory is attached, but if you push the butterfly down, it fits perfectly, and then the case closes (^.^) *It seems like any silicone ones will work. *Earphones are not included in the product. Please consider and purchase accordingly. Thank you! (^-^)