From Butterick:
Mid-calf dress, wraps front to back and back to front, has fitted, straight front with elastic closure at waist and back with flared skirt (no side seams) with button/loop closure.
Recommended Fabrics: Lightweight Broadcloth, Lightweight Piqué, Lightweight Crepe and Stable Knits.
Sizes: (8-10-12), (14-16-18)
Note: This pattern is also known as B4790, issued in 2006 and which is still in print and is available in sizes (8-10-12-14) and (16-18-20-22).