[jakub_g]

I was surprised recently when browsing on Amazon (I rarely buy clothing/shoes there, but I did a few times).

I chose my usual size, but Amazon told me "nope we think you want one size smaller, based on your history and our data for this product".

[jagged-chisel]

I’m curious to know if that was an accurate assessment by Amazon and if you were (or would have been?) satisfied with the purchase of their suggestion.

[ChrisMarshallNY]

I have gone to the manufacturer's sites (I tend to avoid Amazon for purchases over about $50, because fraud).

They usually have something like "If you are a 10.5 for Adiddas, then you are a 10 for us" kind of thing.

Those have worked for me.