From the seller:
Circa late 1800’s-1900, a matching gown for lady and her daughter.. a lovely fabric, woven printed silk or muslin floral silk gauze with black velvet on the edges sleeves and bodices. In very good overall strong condition, there are a few areas which need to be seen to
Pintucks, even horizontal, were very much a thing in the early Edwardian era. And yes, even small children had the whole pigeon front thing going on. The child's dress is what Samantha of the American Girl's collection dolls would have worn.