On one side, this adorable button is natural shell. On the other, is an intricate design of tiny circles and intersecting lines engraved into the shell which makes this button really distinctive. When added to a bracelet or necklace, it promises to bring attention to itself. And at 15mm, it’s ideal with 4 or 5mm beads. See how we used it in Poetry. Expect variations in size and thickness as it is natural shell. The hole sizes will fit 1.0mm leather and most 1.5mm leather too.