The Typical Gauge for Super Fine Yarn is about;
Tension 28 sts - 36 rows = 4" (10 cm)
Suggested Knitting Needle 3.25 mm, US - 3
Suggested Crochet Hook 3.50 mm, US - E/4

This is just a guide though. For a specific yarns gauge please see the details listed at the bottom of each yarns individual page.