As worn by The Duchess of Cambridge Now available in three sizes and a choice of ten colours including classic brown, silver and red. Small – approximately 55cm – 56cm head size Medium – approximately 57cm – 58cm head size Large – approximately 59cm – 60cm+ head size As with all our products, our luxury alpaca hat is derived from natural herd loss in the bitter Peruvian winters and handmade using Fair Trade principles. Light, breathable and hypoallergenic with no lanolin content.