Please use this chart as a basic guideline when creating your chemo caps. Please note that most caps will stretch and give a little as the person places the cap on their head. Hats made with a double crochet will stretch more than a cap made with a single or half double crochet. Also, patients seem to appreciate caps that are a bit longer covering the majority of the ear and nape of the neck.
Baby – 6 to 12 months
Head Circumference: 16″ – 19 ”
Hat height = 7.5″
Toddler -12 months – 3 years
Head Circumference: 18″ to 20 ”
Hat height = 8″
Child – 3 – 10 years
Head Circumference: 19″ – 20 1/2″
Hat height =8.5″
Teens
Head Circumference: 20 1/2″ – 22″
Hat height 9-10″
Adult Woman
Head Circumference: 21.5″ – 22.5″
Adult Man
Head Circumference: 23″ – 24″