Sea urchin fidget ringsThese rings are designed for self soothing. Combining a rich organic texture with the ability to spin around the finger, nodules on the inside of the rings created a gentle soothing for those anxious fingers and minds. Bronze fidget rings in two sizes. The larger one is 20. 28 grams and Uk size H The smaller ones are about 13 grams and are size K , but all the rings have a about a 3 size up leniency due to their design.