I originally ordered a medium size because it's "fashionable" but I had to return it and got a size small. With brands like Penguin and J Crew I tend to be medium for a slim fit, but run small for a regular if that helps. I was also concerned that it might look too sporty, but it's not. I wouldn't wear it with dress pants, but it doesn't look like I'll only wear it to the gym either. Suitable for chinos, jeans, etc. The fabric is very comfortable, the color pleasant.
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