The motif of the ring is universe.
Let's wear universe.
You can choose silver and gold.
Thickness of the ring band is about 1.5mm in the thinnest part, but it changes a little depending on the ring size.
Please refer to size chart below. Ring Size ( Japan / US ) : Inside diameter ( mm )
If you want to know other size of rings , please refer to Wikipedia.
You can also buy other than this product. Please check out "Valley".