Place the fabric squares right sides together.

On the top piece of fabric, fold one corner down.

Fold the ribbon in half and pin or staystitch in that corner.

Lay the strips together again and sew around 3 sides with 1/4" seam allowance.

Clip the corners.

Open the open side a bit and re-arrange it so the seam hits the middle of the opening. This is how you create the triangle shape. In other words match the side seams.

Sew the seam leaving a small opening in the center for turning inside out and for filling with rice or walnuts.

Fill the sachets with rice or walnuts (and if you use essential oils, add some drops to the filling at this point).

Fold the raw edges in and press.

Hand stitch the opening with a ladder stitch.