The geometry of the ring is a metaphor for our tortuous love. After multiple turns, two hearts finally have met, got closer, face to face. It is a good gift for your lovers. This ring is a size 8 (Inside Diameter 18 mm), and it could be reasonably expand up to 8 1/2(Inside Diameter 18.5 mm) as it is adjustable. The height is approx 2 mm. To check your ring size, please click http://www.ringsizes.co/. Please don't hesitate to contact me if you want more size or material option.