Flower Child Cardigan

First let me say that this is NOT an XXL or even XL. I’m an XL and it comes nowhere near closing in the front but it doesn’t have closures and is meant to be worn open but I’ve noticed that garments that are stretchy elongate when hanging on a hanger from the shoulders. The mannequin is only 34” chest and it doesn’t come together on it either so I’m thinking this would fit a small. Sleeves are long. Be careful putting on as to not pull the yarn.Shoulders on back of mannequin are 15” across