It says it's a size medium girls. I am a woman size small and it fits fine.

This cozy and stylish hoodie from Forever 21 is perfect for girls who love unicorns. The pink and white color combination with a cute unicorn character makes it a great addition to any casual outfit. Made with high-quality plush sherpa, it is perfect for keeping warm during fall, winter, and spring seasons. The pullover hoodie comes in size M and has a convenient pullover closure.