Eureka Classroom Supplies Happy Birthday Crown Paper Party Hat, 32 pcs Includes (32) Happy Birthday crowns, Happy Birthday crown classroom party hats measure 8'' tall. Make your students' birthdays extra special with this colorful Happy Birthday crown party hat! Perfect for students of all ages, this paper birthday crown is adjustable to fit all sizes. These Happy Birthday paper crowns are tons of fun, and make a great small birthday gift for students!