Vintage Mr. B of California pastel ruffle accent dress SZ M

Adorable vintage Mr. B of California long dress with ruffle and lace accents. Has small flaw as shown, otherwise great condition. No stains. Tag states size 16 however vintage sizing is substantially smaller and measurements. Are closer to M. Please confirm measurements will work for you. Measurements: Pit to pit: 19 1/2” Waist: 16” Length: 56”