Signé Incognito abstract floral footed romper tagged size 68 but seems best as a modern 0/3M conservatively based on measurements.
There is some wear on the satin rolled hem around the neck, arms, and snaps at shoulder as shown. This is such an adorable piece!
Measurements are
18 inches shoulder to cuff
13 inches shoulder to saddle
10.5 inches pit to pit
6.5 inch inseam crotch to ankle