I used under 2 skeins of Lorna's Laces Shepherd Sport in Cedar for this. Unblocked, it's about 55 inches long. Here's a closer shot of the many, many, MANY cables in this scarf.
Truly, though, the cables were not so difficult to do, following Grumperina's instructions on how to make cables without a cable needle. It's really a great pattern because it isn't too boring, but it also is not so complicated that it requires focused attention. And I truly think this is one of the more beautiful items I've ever knit. I hope lucky hubby appreciates this! I think he does, see that it took me, oh, 6 months to knit this! Not dedicated knitting, of course, and many other projects were begun and completed in the interim. But still, 6 months!