Diameter: 5mm In a case [YHM corporation] Accessory parts fasteners (round rings/lobster clasps/crimp ends) Accessory parts 699 R12①-19 ⊹ ࣪˖ ┈┈ ˖ ࣪⊹ ┈┈⊹ ࣪˖ ┈┈˖ ࣪⊹ Check out other products ˊ˗ ☞ #List of other products from Ritz Shop ⊹ ࣪˖ ┈┈ ˖ ࣪⊹ ┈┈⊹ ࣪˖ ┈┈˖ ࣪⊹ ○ May be shipped out of the box (˘¯˘ )ᐝ ○ If I don't know much about the product, I may not be able to answer your questions, but please feel free to comment if you have any questions ✨️