Sweet Darling is a square corner to corner, moss stitch blanket, that can easily adapt itself to any size you want and can be made of any weight yarn with the appropriate sized hook. Yarn choices should be 2 contrasting colorways with long, progressive color changes.

Noro yarns make many good choices, and for a completely washable blanket, I like Red Heart Melange or Knitpicks Chroma Worsted