The snoods are designed as a one size fits all add your child's age to the notes.The diameter is approx 28cmAdult sizes are also available in a separate listing  How to order:In stock fabric is pictured in the listing gallery and named choose your fabric and add to notes. Snoods are sewn with a twist. Fleece lined snoods will be a larger fit due to less stretch. *Please note* The fabrics worn by the models and examples of snoods may not be in stock, the in stock fabrics are pictured seperately and named