Betseyville is a Betsey Johnson brand, yes? I don't have any betseyville, but I find Betsey Johnson true to size (and have been eyeing a few betseyville pairs for spring/summer)
I tried a pair on in a DSW and couldn't even stand in them for a couple of minutes, they were so painful. I think they have cute styles, but you couldn't pay me to wear any of them, sadly!
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"Good taste shouldn't have to cost anything extra." - Mickey Drexler