AUDATEMens Casual Cotton Shirt Autumn Winter Long Sleeve Band Collar Henley Shirt Tops

I normally have xxl which covers a large tummy size 48/50 chest. What size would suit?

I'm six feet tall, 40 chest with a bit of a beer gut. would i need medium or large? don't want it to be tight around the stomach. many thanks.

My son is 45ins chest would 3xl fit?

I'm 44" chest with a bit of a belly. any recommendations