I'm not skinny, let alone very skinny, but an extremely skinny fit is the only way to get a standard shirt that fits me well given my larger than average neck. I take a size larger than usual to wear around my neck and the "extreme" slim fit reduces the size so it's not baggy. For the record, I'm 5'10, 180 pounds, semi-athletic, like a retired athlete who recently let go. Haha.
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