A pentagon is the perfect shape for sweeping around a ring; flat on the inside and ridgy on the outside. Plus, pentagons are the best.
US sizes 6, 7, 8, 9, and 10 are available; select your size and desired material from the dropdown menus before ordering. The open nature of this design makes it bendable; you can squeeze it to make it smaller, or open it a tiny bit to get it over a knuckle.
This simple design was made in Fusion 360. The idea for an open ring with a swept geometric shape was inspired by two other lovely Shapeways designs: Secret Hidden Heart Ring for Introverts
and ALEPHba Jewelry