From the Knit Rowan website:
Knit these elbow length accessory arm warmers from Warm & Toasty, a design by Marie Wallin using Alpaca Chunky an amazingly soft chain construction yarn (alpaca and polymide.) With a ribbed main section, chunky cable edging and thumb opening, this pattern is suitable for the average knitter.

Finished dimensions:
Each completed arm warmer measures approxinately 50 cm (20 inches) long.

Yarn Information:
Photographed in Wren 072
3 skeins
231 yards