I would call first
Yes, they should have black Nike slides size 15
they have a section for bigger sizes at the one in Canal Winchester but its slim picking they have 2 bigger locations one is in title mall and one is on east broad its shoe dept encore on e broad its really big as is the one in Tuttle but I have not been to the east broad location yet but the 2 bigger ones have way more stuff bigger selection of shoes purses sandals etc but I would call and ask or like the other person said the website but I've called before and they're very helpful!
You can look at their website or go in.
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