Toot! Toot!This is a great way to wow your guest! Personalized conductor hats are the way to go when you want to add wow factor to your child’s party. This is a Party favor they will keep and have fun with for years to come. Let your little train engineer dress the part when you visit the railroad museum. These cotton train engineer hats are fun for kids to wear at a train-themed birthday party or as part of a Halloween costume. " 8 1/2 " Adjustable snap back on the last snap it measures 19 inches in circumference and on the first snap back it measures 23 inches in circumference. Simply Email me your special party guest names =).