I am getting ready to purchase this Columbia Roc ll jacket but I am not certain of the size to purchase.I am 5'6", 150 lbs, my chest measures 40" and my sleeve length is approx 32.5". I looked at some of the customer reviews and some stated that it runs large and you should consider buying a size smaller.

Tim, buy one size smaller than you normally wear and it will fit perfectly. I own 3 ROC jackets and they are all one size smaller than what I would normally wear. I don't know why, but these do run large. Normally I wear a large (if not XL) and all 3 of the the medium size that I own fit perfectly. This tells me they all run large. Buy a ROC jacket, you'll really like it.
...GTB
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