Beverly Hills Polo ClubMen's 4 Pack Knit Boxer

Im a 36" waste what size should I get?

How well does the waistband hold up? Getting tired of boxer briefs that stretch out and won't stay up.

Ifmy boyfriend wears a size 42 in jeans should I get XxLarge?

Hey my son says he needs larget boxers, currently in a largr. He says the waist is fine but yhe legs are getting tight. Should i get these in a large?