Vintage Simplicity 4538 two-seam top by elegant musings (My note: tie either end of a piece of elastic around middle of upper arms, crossing back. If comfortable to reach forward then that is the right width.
Style with versatile fabric - makes ponchos/shrugs/scarves/jackets/shirts. Poncho: Put head through center to wear at an angle, v at front, or sideways. Shirt: Wrap back & snap in front, then drape neck over snaps.