Specification: Size: As the picture shows (adjustable) Material: Alloy Weight: 4.5g Package Included: 4 x Adjustable Open Ring Dinosaurs Going back to the Jurassic period is an interesting thing I think Tyrannosaurus and Triceratops will be a very suitable pair just like you and me. Adjustable crotch ring: Diameter is about 0.9 (2.3cm) Fully adjustable ring fits almost any size comfortable to wear. Beautiful and sparkling: Rings MaterialAlloy Delicate bling pure and beautiful. The advanced and elegant look sets off your noble temperament. Anniversary gift: The growth ring represents a person's life is not smooth, it is a valuable keepsake for your family and another special occasion you want to make memorable. Note: 1. There may be a small size error of about 0.5-1mm due to the measurement errors. 2. The object color will be slightly different because the contrast of the computer and the monitors are not calibrated in the same way.