Noise cancelling headphones

LSU628

I am looking at ordering the Baby Banz noise cancelling headphones for DD. She freaked out last 4th of July. We went to Cape Cod, and with no a/c, the windows were open every night. There were fireworks almost every night leading up to and after the 4th. We are going back this year, so we are looking at ordering the Baby Banz headphones. After reading some of the reviews on Amazon, people complained they were too tight on their toddlers. Anyone purchase them and have any feedback on whether I should buy the baby or kids size? DD is very petite FWIW.