Taken from Modern Top-Down Knitting: "The graceful sleeves for this cardigan accentuate the yarn's luxurious, weighty nature and are worked differently than the sleeves on the other garments in this book. They are a version of the kimono sleeves...where sleeve stitches are cast on at the same time as body stitches and are worked top-down in one piece."
This pattern is in Modern Top-Down Knitting, page 111.
Two size US 10-40" circulars are required but not included.