Package included: You will get 2pcs blank rings in total with 2 different colors for your choice. Size: The diameter of the ring is 18.5mm long, the size of the tray is 19mm long 20mm wide. Material: The adjustable ring blanks are made of brass, which is durable and long lasting , not easy to fade, can serve you for a long time. Easy for DIY: The ring base has 3 claws for holding beads or gemstones in place.You just need to put in the gemstone,and then use the tool to bend these claws,which facilitates better fixation of the gemstone and prevents it falling off. Adjustable: This blank rings can be expanded or lessened on the basis of your finger.The adjustable design helps you avoid the hassle of choosing the wrong size, and also allows the ring to be worn on multiple fingers, making it more comfortable to wear.