Our bonnets have been designed to fit your child's head snugly and comfortably. The trim around the face is elasticized and the top panel is made of stretchy cotton, therefore they will expand a little as your child grows.
Our Sizing is as follows:
XS - Preemie Size: 0 - 6 months (fits up to 16 inches)
S - small: 6 - 12 months (fits up to 18 inches)
M - Medium: 12 - 18 months (fits up to 20 inches)
L - Large: 18 - 36 months (fits up to 22 inches)
Keep your child's physical development in mind when ordering. For example, if they seem to outgrow clothing faster than most children their age, order a larger sized bonnet.