Vintage Wee Gentress Bunny Tulip Shift Dress: 12y?

Vintage 70s Wee Gentress bunnies + tulips shift dress.
• Tag size: 14y
• Estimated fit: 12y… maybe women’s XS? Please see measurements in photos — this does not have any stretch
• Flaws: None noted! String + safety pin present which makes me believe the tag fell off but never worn