A Tried and True Pattern: Pony Tank
With the Pony Tank, the fitted bust with A-line shape provides a flattering swing top or dress. I find the v-neck is just the right amount of cleavage and added technique to make this tank feel special. I've sewn this tank as drafted, slimmed the shape, cropped it and added a scoop neckline. I plan to mash sleeves onto it in the future.
To start, project or cut out your pattern piece. I’m using a projector so that’s what you’ll see in the photos below. Check the finished measurements before grading out for the waist or hips. The pattern recommends choosing a size based on your bust. I normally grade 1-2 sizes at the waist but don’t need to with the swing shape.
Working with your front bodice pattern piece, we’ll create the scoop neck cutline. If you have a french ruler use it to create a gradual scoop. If you don’t have one, no need to worry. You can freehand draw the scoop or find a bowl or cup to use as a guide. You want this to be gradual and about 1” above the v-neck point along the fold on the front. I used a washable fabric pen to draw mine on. If you are worried about this step, I’d recommend drawing your scoop higher. You can always hold it up and cut it down a bit more. I'd recommend using a washable pen such as the Frixon pens or Clover washable pen.
Now let’s measure for the new scoop neckband. Each neckband length will be different depending on where you drew your scoop. Quarter your neck opening then measure the opening. I find it easiest to measure the neckline from center front to center back and double that. Since you want the neckband to stretch slightly, I use 85% of this measurement. Lastly, add in the seam allowance doubled (⅜ x 2). The height of the neckband will be 1.5”.
My neckline was 27.5” x 0.85 + 0.75 = 24.125” x 1.5”