From Schoolhouse Press:

A true classic from the mind of Elizabeth Zimmermann. Updated to include options for many of the subsequent variations, including: stand-up collar, sleeves, back flap, EZ’s Applied I-cord, buttonholes, and more. Plus directions for Meg Swansen’s Elongated Version, the shape of which flatters any body type. Multiple sizes for all.

Print version comes in a 3-hole, archival quality sheet protector.

Pattern description from Knitting Workshop: “The RIB WARMER, in 3-ply Sheepswool, is made in two pieces and joined at the center back. Fits most average adults.”

“The RIB WARMER is another Rorschach sweater, now over 25 years old. Approximate GAUGE, 4 stitches to 1 inch.”

From the back of the book: “For many years, I and thousands of other enthusiastic Elizabeth-watchers have heartily enjoyed her wit and wisdom. Elizabeth’s many devoted fans are sure to welcome her new publications with open arms and eagerly poised needles.” --Barbara G. Walker

This pattern may be found on pages 104-105 of Knitting Workshop, or page 69 of the Knitting Workshop Updated Edition

Originally published 1956 for McCall’s Needlework. Also printed in Wool Gathering #7.

Also available in Spun Out #17 from Schoolhouse Press.

A related pattern, Ribwarmer Revisited, has instructions for a longer version.