I've been wearing the Diadoras for a few years and have been quite happy with them. When I contemplated buying the Sidis I was concerned because I always heard that they run narrow but for me they fit pretty much the same as the Diadoras, including in the toebox and heel. The Sidis I have are designed to be worn without socks so I wasn't expecting them to fit quite like other shoes but I can go between them without really noticing any great difference in fit.




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