(see comments for pattern suggestions) - Tuck Shawl.for inspiration only.Wish I can find a pattern for it. in front Flat measurement - neckline is from end to end; outside bottom edge measures from edge to edge.
Burda Style Beach Dress Hard to believe: a rectangular piece of fabric with side buckles turns into a fancy, backless sun wrap. Variant B with added flounce gives special swing. could use this pattern for wrap around towel.