Eh, that hasn’t really been the case in any chinos I own. If it’s too tight, then I’d suggest sending them back and maybe sizing up and have the waist taken in (if possible). Buying something that doesn’t fit often results in money wasted because you won’t wear it.
Cotton always stretches a bit. Chinos may not stretch as much as denim, but I’d wager you’ll get about another 1/4” in them as you wear them. Wash cold and hang dry.