From Trend Patterns:
Easy to wear must have that can be made as a casual or elegant occasion dress. The Bias T-Shirt Dress has a comfortable bias fit in the body, with fullness in the skirt giving a voluminous draped hem. And a casual looking T-Shirt sleeve shape. Similar to The Square Dress, the pieces are cut on the straight grain and sit on the body on the bias, therefore achieving it’s fit and flare silhouette.
This pattern is best used with a light to medium weight fabrics with a good bias (nothing too stiff that has no give on the bias). There is a keyhole in the back neck, so a small hook and eye is needed as a fastening here. The zip is sewn into a diagonal seam at the back starting under the arm so it’s very hidden, but don’t worry the seam is on the straight grain so easy to sew.
We have rated this pattern as Moderate. The Bias T-Shirt Dress overall is fairly simple, however some of the pattern pieces are very large so you will need a big space to cut out and the zip is inserted in the middle of the back seam.