Model is wearing a size 12.
Available at Neiman Marcus
Size 4-6: https://www.neimanmarcus.com/p/zoe-girls-alice-two-toned-tulle-skirt-dress-size-4-6-prod251290342?childItemId=NMK1NEY_
Size 7-16: https://www.neimanmarcus.com/p/zoe-girls-alice-two-toned-tulle-skirt-dress-size-7-16-prod251310177?childItemId=NMK1NF1_