Gauge in #4 medium weight (10ply) yarn:

4.5 sts per 1” in stockinette stitch
5.25 sts per 1” in Stars Stitch pattern

Finished Measurements:

0-6 months: Circumference: 12” relaxed
Height: 5.5”

Child/Teen/Small Adult: Circumference: 18.75” relaxed
Height: 7.5”-8”