I'm 5ft 10" and 166lbs. I ordered a large one. It fits my chest well, does not require any additional material, but it does not fit. Slightly more excess at the waist. For reference, I'm wearing size 32 jeans. The material of the shirt is light and feels exceptionally soft. The colors are beautiful. I have the teal, royal blue, and neon blue versions of this shirt and they are very bright and eye-catching.
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