This doesn't take much of an explanation, so enjoy these suggestions, in a range of styles—from a dark take on a sailor's knot to charmed chains of various weights. But remember, if you're undoing a few buttons to show them off, get a tan first.
Miansai, $325
Rogues Gallery,
$286
Lanyard,
$66
Pyrrha Design,
$234
Jolita Jewellery,
$132
What is this?