Nicky Bigs Novelties Red/Green LED Light Up Elf Hat and Elf Shoes. These are a nice feel and look. Made of 100% polyester. Balls light up and blink when battery tab is pulled and switch is moved to on position. The hat has an opening of approximately 62 cm. The shoes are one size fits most approximately 8 shoe size. Hat is made to slide down and cover your ears or sit above them. It is nice addition to a beanie cap on cold days. Use a beanie cap or skull cap under the hat to help fit better on smaller heads. The hat measures 12 x 12 inches when flat.The felt colors may be darker than the photo due material changes which are inherent in the manufacturing process.