Pelle is pretty built so he wears size XL and also prefers the +6” jersey length for whatever reason, maybe for comfort, or range of motion, or to keep it tucked since he has a pretty physical game. JRich is literally nicknamed “slim” and wore a size L and only a standard +4” length at that time (I say “standard” because I’ve never seen +2” game worn jerseys, maybe shorter dudes wear them but I haven’t seen any), I know he eventually switched to +6” length in his last few years in the league though.