This is what I'm calling my mammoth skull ring. The one in the photos is a US size 10 and is 36 mm or 1.417 inches from the top of the skull to the tip of the chin. So in other words, it's huge! It is heavy too! In a US size 10 it weighs in at about 43 grams or 1.38 troy ounces. This is solid 925 sterling silver with a solid back. White ring box and white gift box included, see image. I spent a great deal of time sculpting this to be as actuate as possible anatomically, so rest assured that if you could shrink down an actual human skull to this size this is how it would look cast in metal and made into a ring. I also sculpted this to be as large as possible for an anatomically accurate skull ring while still being comfortable to wear and looking astounding! This ring gets peoples attention because it's huge and commanding! Out of all of the jewelry sculptures that I've created thus far I love wearing this one the most! Pick a US ring size from the drop down list above, which goes from US size 7 to 12 in half sizes. Although, if you ask me, I can make it larger, I just need to quote you a custom price for that. I custom make this so give me about 10 business days to make it. Need help converting ring sizes from different countries to US ring sizes? Here's the ring size chart I use. http://en.wikipedia.org/wiki/Ring_size No problem if it doesn't fit though, just send it back and I'll make you a new size by resizing it. Thanks for taking a look!