One fact you can be sure of - no two heads are the same! ALWAYS measure your child's head before purchasing to ensure getting the accurate size.
Step 1: Distract the child with a toy or food (so they don't try and help you!).
Step 2: Use a measuring tape to take measurement. Otherwise use a ribbon to take the size then use a ruler to find the measurement.
Step 3: Purchase the size closest to your childs measurement. Our hats are very stretchy and will grow up to 4cm.
FOR EXAMPLE: The child measures 45cms, you will need the 47cm size giving plenty of future wear. It's important to get the hat closest to your head size, if it's too big the hat will block the child's vision, causing uncomfort and a good chance of them pulling it off.