Octarose

Here is a rose-like paper ring. You can make this only by folding a flat ring with a hole.

The problem for you is to find how to do it.

This puzzle is based on a paper thing as a simple fashion ring for a private party.

At the first release, we experimentally made an assembled version with a box.

Now, the flat verion, the set of two unfold sheets with a simple guide, is available.