Wrap a tape measure around the widest part of the head going just above the eyebrows and over the hair. Insert your index finger inside the tape measure (allowing extra room for growth). Do not pull the tape tight. We generously size our Little Lids caps on the big side. No need to size up. If you do not have a measuring tape, you can use a string or piece of ribbon, then measure it against a ruler. You can use the measurements from your child's last doctors appointment.
Read the measurement in centimeters and compare it with the size chart. If you are unable to measure your child's head, we recommend that you order the age appropriate size.