Review on Anti-Allergic Titanium Earrings: Tiny Ball Studs for Tragus, Helix, Cartilage - Silver, 2mm/3mm - Men, Women, Girls - Includes Pure Titanium Earring Backs by Stephen Russian

I previously bought the 4mm size and wanted the smaller size for my second ear piercing so I ordered the 3mm size. That's less than I expected. I didn't expect the two sizes to be so different. I had to check the box again to make sure I got 3mm and not 2mm. I definitely wouldn't go any smaller as the ball can go through an ear hole (I've experienced this with another pair). But for wearing 2 earrings at the same time, this is a good everyday combo.