Sequin top with sheer black back

Pretty dressy Banana Republic sequin detail top with silver thread. Sleeves hit about elbow length, and the back zips and unzips almost all the way down. The fabric in the back is also sheer. The shirt is not cropped, but works really well tucked in. The hem is rounded, so it sits higher on the sides than in the front and back. The neckline is a bit of a boatneck. Size 6, but fits more like a size 4/size small, especially with a bra.