Please read the profile first m(_ _)m Please check the product description. 18K post earrings ⚠️ The ball is not 18K, but it is allergy-friendly (nickel-free material). ※ The post is stamped with K18. (Not a coating.) ※ Silicone W-lock catch and nickel-free catch are included. These are also useful as sub-earrings ^⁠_⁠^ 4mm size, suitable for both main and sub earrings! ✨️ Approximately 4mm One earring. ※ For a single earring, shipping will be by regular mail. If you prefer Yu-packet (trackable), it will be changed for +100 yen. Please let me know before purchasing m(_ _)m ※ Made in Japan for peace of mind. ◾️ Illustration model's ear length: 6.3~6.5cm K18 post, PT900 post Allergy-friendly (nickel-free) post Earrings are sold.