@smileabit I just used a basic long sleeved leotard pattern, I think it was My Childhood Treasures #10 that I changed to have a large keyhole back. I drew the design for the black parts on the paper pattern and appliqued onto the nude base before making up. I have used this technique for quite a few leos where younger girls need some coverage but want the cutaway design. The nude parts double as a lining with just a crotch lining added.
The stoning is all ab clear in various sizes from ss16 to ss40. I think the black is my favourite costume although this red one comes a close second and I just love this sassy pic.