I ordered these in a 2X (size 14-16) for my tall & thin 9yo who currently wears a 10 or 12.  She couldn't get them all the way up her hips/waist.  They have no give and do not stretch.  I wish I'd have listened to other reviewers who suggested moving up to adult sizing, but at the time it just seemed insane to need a ladies legging for a 9yo girl.  Would not buy again.