Tommy HilfigerMen's Underwear Cotton Classics Megapack Brief - Amazon Exclusive

What do the sizes of sm-xxl correspond to in waist size in inches (e.g. 36")?

I bought the xl. my waist is 39 and they fit fine. however, they're made of 100% cotton. should i have bought the 2xl?

do these underwear comes in sizes 30 to 32

Country manufactured in?