Aww her hair looks similar to Lola's in thickness. I haven't had Lola groomed so she has more obvious bangs with her top knot.
As for bands I bought some at dollar tree, they're kinda like a piece of thin stretchy plastic, not rubber band-ish. I wrap them 3x and they keep her hair up, don't get tangled, and they're easy to remove.
They have black ones online, the ones I have are pastel colors and I think they had clear.
Bulk Basic Solutions Black Rubber Hair Ties, 500-ct. Packs at DollarTree.com