From the pattern:

FINISHED MEASUREMENTS
Chest: 31 (35, 39, 43, 47, 51, 55, 59) inches
Length: 23 (24, 25, 25.5, 26, 26.5, 27, 27.5) inches

Note: This pattern was designed as a jacket to be worn over layers and fit with 3-4 inches of ease. The model shown has a 32 inch bust and is wearing a size S (finished bust measurement of 35 inches). To make a more fitted jacket, knit a size that’s closer to your actual bust measurement.

Good substitute yarns would be Manos del Uruguay worsted-weight wool or Malabrigo worsted merino.

Description:
Everybody who can knit knows how to knit garter stitch.

When conceiving this jacket, my aim was to pare down design elements to the most basic: the knit stitch, basic increases and decreases, and dropped stitches. The result is a punk aesthetic that remains adaptable to all manner of personal styles.
You will not purl a stitch when making this jacket. If you’ve never knit a sweater, you can knit this one and enjoy every minute.