◆ Rubber rings, size 13, set of 6. They can be worn stacked, or paired with your existing silver rings. ◆ Color: Black only. Width of one ring: approximately 2.3mm ◆ Made of rubber (Korea) ◆ Due to the nature of these rings, please allow for slight size variations. ◆ Ships the same day if payment is confirmed by 3 PM. ◆ Shipping via Yu-packet.