I bought the same t-shirt in size XL and it's a bit loose for me. This one fit perfectly. So if you are 6'3" tall, 44" chest, 16 1/2" to 17" neck, 37" sleeves, 34" waist and under 220 pounds this should work for you. I have the same screen printed shirt. So I like the quality of the shirt. I would easily recommend them to anyone.
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