I'm about your height but have about 5 pounds on you and 2" more on the waist

The hardest dimensions for me are the arms then the chest

I always thought I had skinny arms till I tried about a dozen jerseys

Usually buy size large but still most feel too tight on the biceps and chest

How should a jersey feel? I'm starting to think of going to XL, but then what does the avg American at 5'10" and 180lbs wear.....XXXL?