CRIB Question

My little girl is very long and we do have a good size crib so I thought. But she's keeps rolling around and smashing her head on sides and getting stuck in the mesh breathable bumpers we have. I tried vertically and horizontally both I failed. This is not fun at all have no idea where else put her all the cribs seem the same size. She is only 7 months. Any brands ladies of what to buy or what to do. I can't be up all night waiting for her to smash into side. Please help.