Portico, aka the TTL Mystery Shawl 2012 is a lovely top down, half circular shawl with a wide border of leaf lace that increase in size to the bottom edge.
I used Jade Sapphire Silk/Cashmere 2 Ply and made the small size. I think my colorway might be exclusive to Purl Soho, because I don't see it on the Jade Sapphire site. The pattern also gives instructions for a larger version, but be forewarned it uses a lot of yarn. You'll need almost double the amount of yarn for those last 40 rows.
Size: small [large - aka extended] Finished Measurements: 52 [66.5]” (132  cm) wide x 17 ” (43  cm) deep
Yarn: Jade Sapphire Silk Cashmere, 55% Silk, 45% Cashmere; 400 yards / 365m per 55g skein, color: Green Lantern, 1 skeins NOTE: I used almost the entire skein for the smaller size. I recommend having extra yarn on hand for both sizes just in case.
Needles: US 6 (4mm) 24 or 30” circular needles or size to obtain gauge
Gauge: 18 sts & 22 rows = 4”/10cm in Stockinette St- blocked, always take the time to check gauge
Other Materials: 9 stitch markers, tapestry needle