V-Neck with Tab

This V-neck has a small tab across the point, which holds the neckline in place.

Views: Front and back, drawn together
Named layers: Sleeve L, Sleeve R, Body, Inside Back Neck, Neckband and Neckband Tab
Anchors: 166 on the front, only where a line turns
File: Editable vector in Adobe Illustrator

How to draw a v-neck with tab flat in Illustrator

Open Flat Library in Adobe Illustrator and go to Tops or Dresses, then Neckline.
Choose V-Neck with Tab from the pictures. It is drawn on the template, front and back.
Pull the blue points to change its length, width, neck and sleeve. The front and back redraw together, and the figure stops you going too tight.
Insert it into your document as clean, named layers, and keep working by hand.