Coat is basically three rectangles (2 skinny, 1 wide) seamed at the sides and shoulders, leaving space for the neck and the arms.

Sizes:
Width of back at lower edge and underarms--16(20)“
Width of each front--8(12)”

No row gauge or finished length is given but picture shows coat is ankle-length.
Stitch gauge: 10 sts = 3.5”

Materials: In 70-yard skeins of Heavy Rug Yarn, Colors A and D--5 skeins each; Color B--4 skeins; Color C--2 skeins.

Description (below) says coat is crocheted, but it is definitely knitted.

Sleeveless maxi coat crocheted in familiar afghan pattern, made of American Thread yarn.

Picture of mid-section