Gingham Pink and Black Bow Dress

So sweet gingham pink and black dress with 2 little bows dress and white pants. There is no size tag on the dress but it appears that the dress is smaller than the pants. I believe the dress is for newborns while the pants say 3 months. Brand new without tags. Dress- no size 13" length 9.25" chest Pant- size: 3 month 10.5" waist (has elastic stretch on back) 8.5" length