Upcycled Wine Cork Snowflake Ornaments set of 3 by LiteraryCork
this would be easy to do without a pattern, make first row as long as needed then decrease every other row until you get it as short as you'd like for the arm length and the wrap around the back, then just repeat for desired length.
Hey, I found this really awesome Etsy listing at https://www.etsy.com/listing/191988304/plus-size-hand-knitted-ecru-poncho-with
cocoon poncho. A huge dose of inspiration from UNIFORM natural. Love this.