ArrowMen's Hamilton Poplin Short Sleeve Button Down Plaid Shirt

I've never bought arrow shirts. does the sizes compares to the ralph lauren big and tall shirts?

I have a 49" chest, 6'1", long torso, what size shirt should I order?

I normally wear a size 16 neck in a dress shirt. Not used to ordering small/medium/large. What size should I order ?

Do these have Velcro pockets?