What a darling outfit and a cutie! It looks like it may be too fluffy for the car seat to be safe though. To double check buckle baby in with it and then unbuckle without loosening the straps. Take the sweatshirt off, put baby back in and if the straps are too loose, the sweatshirt isn’t safe.
@laniejay is was just for the picture. The size of that sweater is size one but was just for the pic that looks cute.but thanks ")