Errata!

Under Back, after casting on and working 6 rows in rev St st it should read:

Next row: (RS) P7, place marker (pm), work Row 1 of Celtic Cable chart over next 21 sts (inc to 25 sts as shown on chart), pm, p8, pm, work Row 1 of Celtic Cable chart over next 21 sts (inc them to 25 sts as shown on chart), pm, p7--72 sts.

More notes from the designer located here.

12” wide at top edge, 14” wide at bottom, 3 3/4” deep at base, and 10 1/2” tall from base to top edge (excluding strap), after felting