From Wiggy Studio's Big Flower Collection!

Child Head Size Chart

Newborn
Circumference: 13-14 inches

Baby 3 to 6 months
Circumference: 14-17 inches

Baby 6 to 12 months
Circumference: 16-19 inches

Toddler-preschooler (12 months-3 years)
Circumference 18-20 inches

Wiggy Hat Measurements
Size 1 = 17"
Size 2 = 19"
Size 3 = 20"
Size 4 = 21"

*Velvet Styles may run ½ inch smaller.
Please know that babies may vary in dimensions.