Dude. My girl went from 40" to 51" (and 11.5" shorter than me) in like 16 months. She's almost into women size Rothys. RIP her kids Rothy's collection.My 11 year old went from a kid size 5 to a 7.5 shoe in what seems like 2 months.
Like everything in between skipped it all. Didn't complain about shoes not fitting, either.