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HEYDUDE builds most of its range around a small number of named silhouettes, and those names carry real information: they indicate the last, the intended fit and often the gender sizing the pair was designed around. Two listings with the same numeric size but different silhouette names are not interchangeable.
Details worth comparing across listings:
Colourways and silhouettes rotate seasonally, so which HEYDUDE styles are listed at any point, and in which sizes, changes over time.