This cabled zip-up cardigan was designed by Amy Gunderson. Knit in pieces then seemed, the stitch patterns used result in a very elastic fabric. Stitch patterns used are charted only. Sizes: Small (Medium, Large, 1X, 2X, 3X) Finished chest measurement: 34½ (38½, 42, 46, 50, 54½)" - shown with 5.5" of negative ease. Because of the stretchy fabric, you can choose a size with between negative 6" and positive 1" of ease. A separating zipper approximately 26-29" is also required to complete this cardigan.