They are made of a Pointelle Knit material for extra stretchy-ness and very soft. Newborn heads come in different sizes - Five sizes are available: X-Small/Preemie, Small Newborn, Larger Newborn, X-Large Newborn and XX-Large Newborn. They have a decorative button on the very top. When ordering choose a color and a size.

Size Chart -Unstretched Measurements inside Hat:

X-Small/Preemie is 9 1/2" - 10"

Small Newborn is 11" (6 - 7 pound baby)

Larger Newborn is 12 1/2" (7 - 8 pound baby)

X-Large Newborn is 13 1/2" (8 - 9 pound baby)

XX-Large Newborn is 14 1/2" (10 - 12 pound baby)