Nicky Bigs Novelties ™ German Army Helmet For Adults or kids historical reenactment. This plastic toy helmet is made of thick durable material however it is only to be used for novelty or costume use. This helmet is not a safety or protective device. The interior will allow the helmet to fit many head sizes. The opening allows up to cm circumference or approximately inches. You can add adhesive back foam in the interior to allow the helmet to fit the smallest of head sizes however we recommend this helmet for ages 12 and up. Each helmet is approximately inches long, inches wide, and inches tall. Size: One Size Fits Most Adults And Some Children Perfect for reenactment, pretend play, Halloween, Costume Parties, or getting wacky.