That is a style characterized by a cut that comes more or less straight down just inside the shoulders for a short run, then continues in a V cut, often bowing slightly inward. It can be very flattering with a push up bra. Of course, this is a guy's point of view.
Round Neckline, Square Neckline, U Shape, V Shape Neckline and Sabrina Neckline
Bateau neckline
Neckline refers to the height of the collar or neck area of a shirt or article of clothing below the chin. A high neckline might include a turtleneck while a low neckline could be a V-neck.
décolleté
Fichu
A woman or girl's neckline should be no lower than two finger breadths below the collarbone. http://www.uptowngaleria.com/jewelry.html
A Queen Anne neckline my research is suggesting. I'm looking for short dresses with the same neckline.
V-neck
It is the low neckline of a female garment.
A fichu
Another name for a boat neckline is a "bateau neckline." This style features a wide, shallow cut that extends horizontally across the collarbone, often revealing the shoulders. It is a popular choice in both casual and formal garments, providing an elegant and classic look.
To finish the neckline of a T-shirt, start by cutting a strip of fabric for the neckline binding, typically around 1.5 to 2 inches wide. Fold the strip in half lengthwise and press it. Align the raw edges of the strip with the neckline, pin it in place, and sew it using a stretch stitch. Finally, fold the binding to the inside of the shirt and secure it with either a top stitch or by hand sewing for a clean finish.