I loved this ring so much- I bought it twice! It's substantial and the diamonds are REAL. It's exquisite yet durable. The one on my ring finger is about two months old, and you can see how well it's held up. The one on my pointer finger is brand new- and that's why it's shinier than the others. Some may think two of the same ring is excessive, but I have combed through every darn ring Amazon sells, and this, by far, is the best deal for what you get. If you can grab it at an additional discount around the holidays, then it's really a no-brainer. I cannot recommend this ring enough! The band is about 2mm thick- I think one reviewer said it was around 2 1/4 cm? I don't know- the ring on my middle finger is a 2mm band, and I would say that all three rings look the same to me (except the middle band is 18K gold- I bet you can't even tell!) Anyhow, you won't regret buying this ring- I was even thinking about buying another one to stack... but I'll try to exercise some self restraint ;)