I made another ring today, this one is a size 8 and I'll be listing it in my shop tomorrow. I thought about doing custom sizes, but I haven't perfected soldering, so whatever size I make will be what I list. I'm almost there though so I should be offering stackable and custom sizing in the near future.
For these rings I've used 16g half round sterling silver wire, just slightly hammering it for texture and then I do something a little extra that gives it a brushed satin finish. They're so comfortable to wear, I've worn my thumbring every day!