Write an article based on this "Measure around the child's head. Add 2cm (0.79in) or 3cm (1.2in) to the measurement. Grab a piece of white cardstock and mark the length. Mark the height on the cardstock."
Loop a soft tape measure around your child's head at about the temples. Note the measurement mentally or on a scrap of paper. If you're a kid making your own hat, ask an adult or sibling to help you measure your head. Write down the new measurement. Forget the original measurement at this point -- you'll be working with this updated number to ensure a good fit. You need the cardstock to be the length of your new measurement, so use a ruler to measure it. Mark the length lightly with a pencil on the cardstock. If you don't have cardstock, improvise with a white manila folder, a thin cereal box covered in white printer paper, or several sheets of white paper taped together for durability. Once you've marked the length, measure it to be 10cm (3.9in) tall. Mark the height on the cardstock with a pencil. These measurements form a strip that will become the headband of the chef hat.