Please do not add this product to your cart on its own—this add-on should be automatically added to your cart when you buy an 18 karat ring. This is the charge for 18k gold rings because Shopify has a variant limit, and this is my workaround to off the full inclusive ring-size set in all three metal colorways and both karat options. If you found this page alone, you shouldn't have, so congratulations on being a snoop, I guess.