Vintage Union made sleeveless top from the '70s. Floral polyester material, zips up the back. Mock neck has button and snap closure at the back. Matching belted sash. Seam on the sash is intentionally not sewn at the middle, just noting this because it's not a defect I just don't know what it's for! Dimensions shown in photos, but feel free to message me for others. Material has some stretch to it. I would guess this is a modern size medium.