Opened ring. Original size: 12 - 13 (Korean size), 52 -52 (EU size) (adjustable) This is an open-style ring with a base size. It can be gently adjusted up or down by approximately 2 sizes for a better fit. Please note that while it's slightly adjustable, it may not suit all finger sizes. Materials : nickel free plated, brass, cubic zirconia, synthetic stone, etc. Made in Korea.