Hurrah! I have finished this collar. The pattern is from a beautiful crafty blog by Emma in Wiltshire; I have a link to it below on an earlier crochet-themed post. This has worked out exactly as the pattern said, and it's really quick and easy. I found a lovely glass button in a charity shop; here it's at the back, but it would actually be nicer as the front, I think - you can see it, and the colour, better below (why does my BlackBerry not give good colour reproduction?!). A quick post, as I'm off out tonight, just to wear it! Woo hoo!