I think the ratchet is key, cuz I tried chepaer (just velcro closure sidis) and they didn't fit. Another often unknown sizing faq is that the half sizers are not longer but wider than the parent size, i.e. a 42.5 will be the same length as a 42, but wider. I also have the high arch, narrow heel, wide toe phenotype. With other brands I would be stepping out of the heel.