This pair of red blood cell cufflinks beautifully references our red blood cells in a tasteful abstract way.
The red blood cell, or erythrocyte, carries life-sustaining oxygen throughout the entire body. The unique and anatomically-accurate forms are modeled after a real blood cell (which can squeeze through the tiniest of capillaries!) Interestingly, red blood cells are hardly even a true cell (they don't even have a nucleus!).
Red blood cell size: The diameter is ~5/8 inch / 16mm.