These ear cuffs use citrine gravel stones. This is a set of 2, and a great deal! The wire (9-pin) is 5cm long, and the diameter is about 2cm (*^▽^*) The wire is stiff enough that you can adjust it with your fingers. They are praised for being comfortable to wear, and many customers are repeat buyers. Also, because these are handmade products, there may be some imperfections... Please understand this beforehand m(._.)m If you'd like to purchase them a little cheaper, I can offer a 100 yen discount if you're okay with regular mail. However, regular mail takes about a week to arrive, and there is no compensation if the package is lost during delivery. Even if it doesn't arrive, you will still need to provide a receipt evaluation. If you are okay with this, please contact me in the comment section before ordering. Please note that we cannot change the price or shipping method after you have placed your order.