This hat has an elastic headband that stretches large enough to fit a large adult head measuring 7.1-7.9 inches in diameter, and a Spring-Stop Lanyard Cord Lock that keeps it tight in place under your chin even in the strongest winds. Price drops from $19.99 to $11.99 to $7.19 when you apply the coupon code "TB34X6LR" at checkout. Shipping is free for prime members or on orders over $25.