We had a problem with Clarks not so long back. ds just wouldn't keep his shoes on his feet (it was such a problem even the nursery noticed) so I took him back. The shop assistant said he had been sold the wrong style shoe for his foot as he has a high instep. They were very good and changed them to a boot style and didn't charge us the extra. It must be different fitters though as when dh took him they recommend he have a full size smaller and yet this time for the change (two weeks later) he was back to an 8h (he's only two I hope his feet don't get any wider!).