Hello experienced parents of girl gymnasts! My daughter is xcel bronze and is competing for the first time this season. Her coach prefers the girls to wear their hair in a high bun. My daughter has very long hair (waist-length) and it’s thick and heavy too. Any recommendation on a bun/hair prop to best achieve this for such long and heavy hair? I heard some of the moms talking about a hair donut and I’ve found them on Amazon, but there are so many sizes and options, I don’t even know where to start. I appreciate any advice and experience you are willing to share. Thanks!