My wife works in a hospital for 12 years, she has said that usually, black men were the biggest, and asian men were usually the smallest. She did say the biggest one she ever saw was white.
with that being said, she also said she has seen far less asian men, that they were usually more discreet and also the area we live in doesn’t have an extremely high asian population. Also that all of these men were almost always soft, and we know soft size doesn’t always correlate with erect size. We know that this is anecdotal evidence, all I’m saying is what she told me. It doesn’t mean there aren’t huge Asians (there are plenty on this site) and it doesn’t mean there aren’t small black men. I’ve known two black guys that told me they hated that stereotype because they were about average and many people assumed/expected them to be huge