Two stitches were used for the star itself: the satin stitch and the stem stitch. The ornament was embellished with the chain stitch. A tutorial for the three stitches can be found on my web site.
The embroidery measures 10.5 cm x 10.5 cm / 4 1/8” x 4 1/8”. The pattern is available in my Craftsy Pattern Store (US$1.00; CA$1.29 these days).