I was curious as to what an 8mm earring would be like, and I like.  They really show up and make a statement.  The color is wonderful and they demand attention on a very ladylike way.  I found that I prefer a wider back so they stand up nicely, but they worked fine even without them. If you love blue topaz, you will love these.  They were here very quickly so I was able to wear them soon after ordering.  I loved not waiting in suspense.  Thanks to Amazon for making these easy to find.