The blanket's center can be used to easily record your baby's growth with a permanent fabric marker (not included).  Gently lay your baby down putting the top of their head even with the start of the ruler.  Very gently stretch out your baby and extend their leg completely flat against the blanket.  For an accurate measurement put your mark at the base of their foot.  Record the measurement with on the blanket itself with a fabric marker or in the attached keepsake growth chart booklet.