In-studio exclusive. Materials: 14k Yellow Gold post and front, Stainless Steel pin Stone Details: Cubic Zirconia Dimensions: 2.5mm x 2.5mm x 2.3mm Thick How to wear flat backs: Step 1: Insert the post from the back of your ear. Step 2: Slide the slightly bent front pin into the post. Press firmly to close. Step 3: Tug lightly from both ends to ensure the fit is secure. To remove, twist, and pull. If the pin is not secure, remove the post from your ear to use as the bending tool. Put the pin into the post ½ way and bend slightly to increase tension. Check the tension by pushing the front all the way into the post and then removing it.