Vintage Teal Cable Knit Sweater

I purchased this on Etsy a few years ago and never got around to wearing as I found it a bit too snug for the look I wanted. The photos are from the Etsy listing. Model is 5'3 and typically wears a small as mentioned in the listing. There are no tags so I'm not 100% on the size but my guess is L. That being said I'm not sure what the material is but it feels synthetic to me. Measurements: Pit to pit - 20 inches Shoulder to bottom - 26 inches My photos were taken at night w/ flash