New in box Kids Ariat Crius Clog Camo Slippers

Sized Small (S) which Ariat lists as Kids 1-2. I bought these for my 6 year old who’s is a 1 and they are too small! I think they would fit best little kids 11 so that what I’m listing them at. See my measurements and shoe size chart for big kids. The way the edge is at the heel doesnt allow the foot to go all the way the way back.