4 inches in diameter Designed with thick shell for durability and extra bounce Features children's favorite characters Lights up when bounced Great for indoor or outdoor play Light up the party with a Hedstrom Light up ball! These balls light up with bounced, making any sleepover, party, or game more exciting. Take them outside and watch them light up the night sky. Each ball measures 4 inches in diameter making them perfect for throwing, catching, and bouncing. Featuring Despicable Me imagery.