Vintage Girls Button Up Cardigan Sweater, sz L? XL?

Description

Smoke free home. Great vintage shape! Looks like the start of a hole under one armpit, but very minor.
No brand or size tags. My best guess is around a kids sz L or XL. My adult daughter wears a sz XS or S and was able to put it on and button it up, but it looked too small.
See measurements:
19.5" long
18.5" from armpit to armpit
Thanks for looking! :)