I call this the Shelly Duvall blouse.
Vintage Saks Fifth Avenue white lace peasant blouse. Collared, lengthwise button-up. Yoke at shoulders and chest; pleated (yoke at upper back also). Raglan sleeves. Gathered at cuffs and waist. Waist is elastic with peplum. Missing belt. Marked a size 12, but looks smaller.
Waist- elastic- 20 (unstretched) to 32" (stretched)
Sleeves (from yoke) 17"