Finished Sizes
Small/Medium: Approx. 16"/41cm long when flat; fits up to 56"/142cm around shoulders (bust+arms).
Large/Extra Large: Approx. 18"/46cm long when flat; fits up to 60"/152cm around shoulders (bust+arms).

Yarn
Yarn information given for Small/Medium; Large/Extra Large in parentheses ( ).
2(3) skeins Rowan Summer Tweed (131 yds/120m each). Or approx. 229(393) yds/209(360)m of an equivalent worsted-weight yarn.
AND 1(2) skeins Rowan Kidsilk Haze (229 yds/209m each). Or approx. 229(393) yds/209(359)m of an equivalent lace-weight mohair yarn.

Needles
US 13 (9mm) 24"/60cm circular needle, or size to obtain gauge.

Gauge
Approx. 9 sts = 4"/10cm in garter stitch using both yarns held together, after blocking.