So we tried a medium escapade with her stupidly fat Vans boots...I'd never recommend a pair of those...to anyone...ever... The boots are so snug in even a large binding that if there were any snow in the binding, they would certainly not fit. That said, we reluctantly went for a burton lexa in size L and bought some upper end DC boots. I suppose that's what we get for going cheap last season! Live n learn...