Yes, I guess but my daughter wore a size 2 until she was about 9 or 10 months. So it just depends on the child I guess. They have the hard soles. Most babies wear a 0 at 2 months.
There are adorable. Fanned and watching. Size 2 means it fits baby with 3.5 to 4 inch foot. my little girl just turned a yr old and is just in size 2, but her brothers were lucky to fit in a size 2 at a month old. There is little rhyme or reason why U.S. sizes shoes the way we do.