Nali Collection Sundress floral shift hi low OS Fits like Medium from top NWT

Nali Collection Sun dress Shift Lace Rose Floral OS M fit Hi Low NWT. Tag says One Size but it fits like a medium 14.5 pit to pit 50 inch stomach which dress is very Flowy so OS is correct from stomach and down Beautiful jersey feel and such a beautiful rose paired with black is stunning Pointed in the middle bottom