Personally, when I bought them individually, I assumed that the earbuds would be offered at half price. Also, what bet size you get is completely random. They will be an inscribed circle 3/8 inch in diameter, but the radius of the nose will be whatever you have on hand. I ordered 4 inserts and they all had different nose radii. They cut, we're sure, but they just aren't what you think they are. In addition, it is not 100% a genuine Sandvik product. But they cut decently so 2/5 seems fair.