"Sizing is much smaller than usual for Mountain Hardwear!" - Review of Mountain Hardwear Transit Shirt - Long-Sleeve - Women's

I usually wear a S in Mountain Hardwear shirts and jackets and I ordered this shirt in a 4, but this shirt was way too small for me. I'm 5'7" and I have really thin arms, and somehow the shirt was uncomfortably tight around my arms. The shirt hem and the sleeves were both several inches too shirt. The shirt looked like it was either petite or kids. I had to return it, so I can't vouch for how functional it is. Disappointing...
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