Kim Kardashian wedding ring had to be something bigger and more impressive than the first one. Kim was once before married too so it was more like a fight for supremacy to have something more than what was first.
Kanye seemed to be not at all miser. It was estimated that the diamond ring of Kim costs 8 million dollars. Of 15 carat that diamond ring was designed by Lorraine Schwartz, a unique style of course. More than this it seems that not only the size of the ring impressed. Kanye was very much interested to give indications and come with ideas so he was directly involved into this. Hopefully to be for eternity this time!