Four millimetres. That's the size of a Studex star. Small enough that it disappears into your look, present enough that you notice when it's missing. Steel finish, tarnish-resistant, the kind of earring that became a staple before you noticed it had become a staple.

Studex has been in the piercing jewellery business long enough to know that the best everyday earring is the one that causes no drama — no irritation, no fading, no awkward green ring. These are that earring.

Wear them everywhere. Forget you're wearing them. That's the point.