Here's what you get once your scrunchy is completely turned inside out:

Our seam allowance is inside the tube, the <disclothed> paris label stands out clearly on the right side, and we have the 2 ends of our tube which are not sewn
The next step is to assemble the 2 ends of our scrunchy to give it its circular shape:
- Join the 2 ends of your scrunchy and overlap them right sides together, edge to edge: this is so that we can sew the 2 ends together, which we didn't sew all the way through earlier.
- Pin the 2 ends together
- Always straight stitch 0.7 cm from the edge. Again, don't forget to make your backstitch, at the beginning and at the end.
- Cut off any excess threads
- Pull on the 2 ends of your scrunchy: the stitch you just made disappears inside the scrunchy which finally has a circular shape