In reply to wbo:
Good point, hadn't considered that there's obviously less flex in a smaller boot, she's not likely to do anything serious this season, don't want something that to her will feel like hillwalking in b3's all day. I've ordered a pair of Charmoz to see what fit etc.. is like. Might try the Sportiva's too, then Mantas if neither of those fit/feel right.
Cheers