A one-shoulder dress for Barbie.

Look for pattern by number at http://www.stickatillbarbie.se.
The website is in English & Swedish, but patterns are available in several languages.

On the website you’ll find the patterns listed on the left, by number, grouped on pages.
Accessories like hats, scarves or bags are listed in the accessory section, below in the left column.
Click on numbers to open a page, look for the numbered image, then for the link to the desired language below it (clicking on the image will only enlarge it).

This pattern comes in a .doc file.

No specific yarn or gauge is given in the pattern.
Sticka till Barbie patterns are usually designed for 4 ply mercerized cotton yarn or other fingering yarn, and gauge for stockinette stitch is given in the yarn page of the site.