<p>Nicky Bigs Novelties Ally Army Helmet For Adults or teen This plastic costume helmet is made of thick durable material. The interior will allow the helmet to fit many head sizes. The opening allows up to 60-61 cm circumference or approximately 24 inches. Foam adhesive inside the helmet allows for a comfortable fit and helps when smaller size is needed. However we recommend this helmet for ages 14 and up. Each helmet is approximately 11 inches long, 10 inches wide, and 4.5 inches tall. Size: One Size Fits Most Adults Perfect for pretend play, Halloween, Costume Parties, or getting wacky.</p><p>Please note that the chin strap is there to assist you in keeping the helmet on your head however this helmet is a novelty or costume helmet. If you apply too much pressure on the chin strap it will break. This helmet is made for novelty or costume use so the chin strap will not hold up when this helmet is used for other purposes other than described.</p> For Ages 14 and Older