From the Churchmouse website:
FINISHED SIZE
Approx. 16–17"/41–43cm x 42"/107cm around.
YARN
2 skeins Rowan Kidsilk Haze (229 yds/210m each); shown in Color 589.
Or approx. 350 yds/320m of an equivalent lace-weight mohair yarn.
NEEDLES & NOTIONS
Size J (6mm) crochet hook for provisional cast-on.
US 10½ (6.5mm) circular needles, or size to get gauge.
Another circular needle to hold stitches while grafting.
GAUGE
Approx. 12 sts = 4"/10cm in stockinette stitch, after blocking.