Whether youre a fierce mama or youre flying solo, this set of three rings will add some subtle color. Just like our other rings, even our stackable rings have breathable inner grooves to allow air in and moisture out, giving you the perfect mix of style and comfortability perfect for any season. When you first wear this ring it may feel stiff. No worries. These rings have a break-in-period and will soften after a week of wear.Perfect Design with unique medical-grade materials for undeniable quality beyond any silicone ring that came before. In a class of its own. Width: 2.5mm or 3/32 Thickness: 2mm or 5/64