Fits perfectly. I am usually a medium and bought a medium. I was hesitant on sizing after reading some reviews stating the vest runs large. I disagree. I am 5'5" and 140 pounds- athletic built. The vest fits nicely. For those complaining about it being puffy... it is a puffy vest after all, not sure why it is an issue!!! I highly recommend this product. Very warm. As soon as I take it off, I'm cold again!!
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