American Eagle, Abercrombie or A. Kids.
Do you live near a Dillard’s?
Their copper key (dillards brand) is so perfect for tweens.
My Ms daughter (now 8th) is very thin and short. Kids clothes are babyish. Some teen clothes are pushing skinbaring limits that she / I don’t enjoy. So she wanted cool, grown up, teen looking, but available in her size.
Cooper key has options going down to really young sizes, but it looks grown up, not like excessive flowers or baby colors. So she had lots of size options for pants vs. shirts. Vs. Skirts.