Please read the profile before purchasing m(_ _)m Please check the product description and size. (2mm) 18K post earrings ⚠️ The ball is not 18K, but it is allergy-friendly (nickel-free material). ※ The post has a K18 stamp. (Not a coating process.) ※ Silicone W lock catch and nickel-free catch Two types are included. Useful as a sub-earring ^⁠_⁠^ Simple design makes it easy to match with any earrings ✨️ Approximately 2mm Single earring mini earring ※ For single earrings, shipping will be by regular mail. If you prefer Yu-packet (trackable), it will be changed for +100 yen. Please be sure to let me know before purchasing m(_ _)m ※ Made in Japan for peace of mind. ◾️ Illustration model's ear length: 6.3~6.5cm We sell K18 post and PT900 post allergy-friendly (nickel-free) post earrings.