How much is too much 0-3 month clothing?

Ra

I got a ton of 0-3 month clothing for our little guy from our shower. I have at least 20 little outfits/sleepers/onesies. I do not have gift receipts for any of them so I don’t know that I can return them. Will they even be able to all be worn? FTM here, so for you moms with experience how long do they wear 0-3 months?