Usually such shirts run small, I ordered a large one, which should have been right on top of the "thin" shirt. But this shirt is huge. The shirt is oversized but I would say it should be considered an XL size ESPECIALLY as the material is already stretchy. Oversized shirt in stretchy fabric. No thank you. The fit is definitely not tight, so if you doubt that the average size can be too small but aren't sure, at least I can tell you that the plus sizes are too big. Should be considered an XL size with a slim fit designation. I mean, the shirt looks great, the material is very comfortable, but the sizing just isn't right and is misleading as having a "skinny fit".
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