Lil' Boo cap sizes 

  • Size XS - fits 44 - 46 cm (17 - 18 inches): Optimal fit - ages 4 months to 9 months. 
  • Size S - fits 46 - 48cm (18 - 19 inches): Optimal fit - ages 9 months to 18 months. 
  • Size M - fits 49 - 51cm (19 - 20 inches): Optimal fit - ages 18 months to 3 years. 
  • Size L - fits 52-55cm (20-21.5 inches): Optimal fit - ages 3 years to 6 years.

We specialise in making caps - so we want to do everything we can for you to get the correct fit. As such, please note any reference to age is from information based on world averages and is guidance only. If in doubt or your child is at the top end of the circumference range, always go up a size. 

Please see our size chart below.

Lil' Boo Size Chart

As all babies and children are different, and grow at different rates, it is best to always measure your child's head before you buy a cap to ensure it has the perfect fit. 

How to measure 

Measure the head just above the top of the ears and midway on the occipital bone (that little bump in the middle of the back of the head).

How to measure

If in doubt, please contact us and we will do our best to select the right size for you.