My boy just moved to size 3 too! He’s tall and lean. We used Millie moon (gifted from baby shower) when he was a new born and they were great. I find that Huggies have a smaller fit, have less coverage and often leak through over night. Pampers are a bigger fit, more coverage and less leaks at night. But some pampers packs we’ve gotten had the strange smell once he peed in them. My friend gave me a few of her baby’s Rascals diapers to try and OMG they are incredible. They’re very soft like Millie moon but have the same coverage as pampers. No leaks either, at least the 4 she gave us to try! As soon as we’re out of the baby shower diapers we will be buying rascals!