hsl is correct. I have them in black patent and they from Neiman Marcus. The SKU on my box is as follows:I saw the Black Patent Iowa Zeppas at Neiman Marcus. This was about 2 months ago... Maybe you should try calling them and see if they can locate one for you?
I would just try them probably. If they are too big, you can always return them.I found one that are like a full size up from my actual shoe size do you think they will fit?
Your other option is to get the pair from NM you found and the ones from BG in what you think will be your size and try both.The black patent platform Iowas are at BG right now. I just saw them yesterday and even slipped on the display. The display was a size 39 so I guess that is the smallest size they have currently. Good luck!