J. Crew Cream Midi Dress Size 12

Chic cream midi dress by J Crew. NWT. This is such a gorgeous dress and I really wanted it to work. No longer available in this size. I ordered my normal size 12 regular. Unfortunately, it runs small and doesn't have much give. Probably a size 10. I think a 14 would have worked for me but it's sold out in that size. Armpit to armpit about 16".