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I don't have too many MLB M&N jerseys but Champion NBA jerseys run tts, meaning a size 44 is 44" around the chest, 22" pit to pit. A size 48 is 48" around 24" pit to pit. Length-wise they are about 29-31" long.Weird comparison, but How do 90s authentic champion NBA jerseys fit compared to M&N baseball jerseys? Thanks