Made from high quality stainless steel.
They measure about 65 mm (2.55 inches) and are approx 9 mm (0.35 of an inch) wide.
You don’t need 2 sizes. These are made to fit most dress shirt collars tight and stiff. These collar stays fit perfectly and do not fall through the holes in your washing machine.
They have been tumbled to a polished finish and have no sharp edges to cut or snag your shirt.
The best priced collar stays out there.