The link works Jan, but you have to be signed up to the VK site and logged on to see it. But it doesn't like my saved pw even though I'm getter their emails...
The width is supposed to be 14" across, so double that would be 28" and I think it'll work after you knit the first round. You could cast on and do one row flat, then join at the end of it.
sue- knitting heretic