Newborn clothes.

So still pregnant despite everything I've tried. Now Im keeping busy to pass time. Today I redid the babys bag and one thing I noticed was the amount of newborn clothes I have. On the tags it says up to 9-11 pounds. Some are bigger. I've also noticed the babies being born on here. Especially at 40 weeks. They're pretty chuncky, so my question is are you guys able to use the newborn clothes? How long if so? Im just thinking of maybe doing some returns before baby gets here.