Such a lovely vintage piece. The way the knit hugs and contours to your body is a wonderful detail. Super flattering with the high-collar neck and knit bobble buttons. There is a slight flare lower hem for addition shape and style. In excellent vintage condition.
I would call this a size X-Small - Small. I'm typically a size Small. It fit perfectly pretty much everywhere. I have a 34B bust and 26-27 inch waist. My hips are 37.5 inches and I'm around 5 foot 5 inches tall. I would pay close attention to the neck hole. Although the dress is also lovely worn with the buttons undone like a V-Neck.
Love the versatile styling. You can also add your own belt if you wish. I'd love to pair this with a fur wrap collar. It is see-through so you'll want to wear a nude slip.
As usual please refer to the below measurements for most accurate fit.
Measurements: Laying Flat / Not Doubled
Armpit seam to armpit seam width: 16 inches wide with additional 3 inch stretch Shoulder seam to shoulder seam width: 13 inches wide with additional 1 inch stretch Neck Hole with buttons done up: 5.25 inches wide with 1 inch of additional stretch Armhole length: 8 inches long Sleeve length: 23 inches long Wrist width: 3.75-4 inch stretched Waist width: 13 inches wide with additional 3 inches of stretch Hem width: 34.5 inches wide Length of dress from shoulder seam to hem: 42 inches long Belt Length: 65 inches wide