♥ This hat is made from a quality wool - acrylic yarn. 25% wool 75% acrylic ♥ It was knit in the round, so there are no seams. ♥ One size fits most. ♥ Approx Measurements: Circumference (stretched): 21-22 inches Length: 22 cm / 8.6 inches ♥ Hand or machine washable (30°C), lay flat to dry.