Easy least do some small and newborn versions of the bible. I found they needed boosting but my lanky skinny boy fitted them until 4 months on some of the smallest closures. And they are super cheap at about £3 per nappy. They were brilliant at containing poo and with a little lamb booster, they held a good amount of wee as well.
We also used muslin squares for the first month as we didn't know how big he was going to be.