The Cell Membrane ring wraps a lipid bilayer around your fingers and adorns it with transmembrane and peripheral proteins. Cell membranes, also called 'plasma membranes' delineate cells and allow transport of ions and small organic molecules between them.
This science ring is made to order by 3D printing and casting in solid polished brass, bronze or sterling silver. Due to the width of the band of this ring (slightly more than 1cm), I suggest you order one half size larger than your normal size for the most comfortable fit. The best way to measure your size is to either visit a jeweler or use a ring sizer.