I am 5' 10 and weigh 240 pounds with a 30" inseam. Are your regular fit on the slim side? And what size should I get?

If you are looking for a roomier fit, we would recommend our Relaxed Fit Poplins, QC Part #T70090. They are sized by chest size; an XLarge is 46"-48" (43"-45" waist) and a 2XLarge is 50"-52" (47"49" waist).